Question 1 A) Two forces F1 and F2 with the same magnitude act on a particle along the same axis. This results in the speed of the particle increasing in the positive direction. Which one of the following is NOT possible? (1 point) Responses The work done by F1 is positive, and the work done by F2 is zero. The work done by F1 is positive, and the work done by F2 is zero. The work done by F1 is zero, and the work done by F2 is positive. The work done by F1 is zero, and the work done by F2 is positive. The work done by each force is negative The work done by each force is negative The work done by F1 is positive, and the work done by F2 is negative. The work done by F1 is positive, and the work done by F2 is negative. Question 2 A)Which of the following are examples of work being done on an object? Choose the 4 that apply.(4 points) Responses holding a 50 kg barbell over your head holding a 50 kg barbell over your head lifting a bag of groceries lifting a bag of groceries pushing on a car that will not move pushing on a car that will not move carrying a box up a flight of stairs. carrying a box up a flight of stairs. lifting a rock off the ground lifting a rock off the ground wind blowing against a tree wind blowing against a tree pushing a grocery cart through the store pushing a grocery cart through the store Question 3 A)Match each term to its correct description.(8 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. Work Power Joule Watt Machine Mechanical Advantage Efficiency Energy Using force to change the energy of an objectThe rate at which work is doneThe metric unit of work and energyThe metric unit of powerAny device that makes work easier to do The number to represent how by how much a machine increases the input forceThe ratio of output work of a machine to the input work of a machineThe ability to do work Question 4 A) Adam lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adam doing work on the book? Work = Force x Distance (1 point) Responses He does work on the book at no time during this process. He does work on the book at no time during this process. He does work only while he carries the book across the room. He does work only while he carries the book across the room. He does work from the moment he touches the book until he lets it go. He does work from the moment he touches the book until he lets it go. He does work as he picks up the book and as he lifts it to the shelf. He does work as he picks up the book and as he lifts it to the shelf. Question 5 A)How does a machine make work easier? A machine makes work easier by changing _______. Choose the three statements that apply.(3 points) Responses the amount of work done the amount of work done the amount of work done the amount of work done the time needed to do the work the time needed to do the work the direction of a force the direction of a force the distance over which a force is applied the distance over which a force is applied Question 6 A)The efficiency of a machine can be increased by:(1 point) Responses decreasing distance. decreasing distance. decreasing force. decreasing force. reducing friction. reducing friction. reducing work. reducing work. Question 7 A)Match the term/picture with the correct description(12 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. A simple machine that consists of a rope that fits into a groove in a wheel. A simple machine that consists of two disks or cylinders, each one with a different radius. A jar lid The blade of a knife A broom handle A rigid bar that is free to move around a fixed point called a fulcrum. A slanted surface along which a force moves an object to a different elevation. An inclined plane wrapped around a cylinder. A V-shaped object whose sides are two inclined planes sloped toward each other. PulleyWheel and AxleInclined PlanePulleyScrewWheel and AxleWedgeLeverLeverInclined PlaneScrewWedge Question 8 A) A wheelbarrow can be used to help lift a load and push the load across a distance. The fulcrum is located at the opposite end where the effort is applied and the load (whatever is in the wheelbarrow) is in the middle of the fulcrum and effort. What kind of lever is the wheelbarrow? (1 point) Responses Class 1 Lever - The fulcrum is located between the effort and the load. Class 1 Lever - The fulcrum is located between the effort and the load. Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load. Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load. Class 3 Lever - The effort lies between the load and the fulcrum. Class 3 Lever - The effort lies between the load and the fulcrum. Question 9 A)How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?(1 point) Responses It allows a larger force to be applied over a shorter distance. It allows a larger force to be applied over a shorter distance. It allows a larger force to be applied over a longer distance. It allows a larger force to be applied over a longer distance. It allows a smaller force to be applied over a shorter distance. It allows a smaller force to be applied over a shorter distance. It allows a smaller force to be applied over a longer distance. It allows a smaller force to be applied over a longer distance. Question 10 A) What is the mechanical advantage of the class 1 lever? Input = Effort Output = Load (1 point) Responses 2 2 4050 4050 0.5 0.5 67.5 67.5 12.5 12.5 Question 11 A) The inclined plane below is being used to lift a box 7 ft. The inclined plane has a mechanical advantage of 1.5. What is the length, x, of the inclined plane? mechanical advantage = (length of ramp)/(height of ramp) (1 point) Responses .25 feet .25 feet 2.5 feet 2.5 feet 7.5 feet 7.5 feet 10.5 feet 10.5 feet Question 12 A) What is the mechanical advantage if the radius of the wheel is 49 cm and the radius of the axle is 7 cm? MA = Radius of Wheel / Radius of the Axle (1 point) Responses 3 3 7 7 16 16 21 21 Question 13 A) Johnny Lumberjack uses a mallet and wedge to help him split wood. The picture shows the mallet and wedge. Johnny Lumberjack uses the wedge because it is a simple machine that provides a mechanical advantage. What is the mechanical advantage of the wedge? Mechanical Advantage= length of sloped side/width of wedge (1 point) Responses 0.5 0.5 2.0 2.0 4.5 4.5 8.0 8.0 Question 14 A) Josh opens a soda can by pulling on the tab. The picture shows Josh opening the soda can. The tab is a simple machine. What is the mechanical advantage of the tab? MA = output/input (1 point) Responses 0.7 0.7 3.0 3.0 9.0 9.0 21.0 21.0 Question 15 A) Maddie is on the weightlifting team at her school. She must lift as much weight as possible from the ground to a straight up standing position. How much work will Maddie do if she uses a force of 6 N to lift 150 kg of weight to a height of 1.5 m? Work = Force x Distance (1 point) Responses 3.3 J 3.3 J 3.5 J 3.5 J 6.5 J 6.5 J 9.0 J 9.0 J Question 16 A) A student used 12 newtons of force to push a box 4 meters down the driveway. Using the formula, how much work, measured in joules (J), did they do to move the box? Work = force × distance (1 point) Responses 3 J 3 J 8 J 8 J 16 J 16 J 48 J 48 J Question 17 A) Marla and Jaxon are hiking outside. Jaxon runs in a straight line up a hill, but Marla walks in circles around the hill until she makes it to the top. The picture shows the paths Jaxon and Marla take. Marla told Jaxon she used a simple machine, an inclined plane, to walk up the hill. Which statement best compares Marla's and Jaxon's methods of climbing the hill? (1 point) Responses Jaxon did more work than Marla because he ran quickly up the hill. Jaxon did more work than Marla because he ran quickly up the hill. Marla did more work than Jaxon because she walked a longer distance. Marla did more work than Jaxon because she walked a longer distance. Marla and Jaxon did the same amount of work, but Marla had less of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had less of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had more of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had more of a mechanical advantage. Question 18 A) The diagram below shows a balanced lever with boxes on either end. What equation would reflect that the lever is balanced? (1 point) Responses F1 × D1 = F2 × D2 F1 × D1 = F2 × D2 F1 + F2 = D1 + D2 F1 + F2 = D1 + D2 F1 × F2 = D1 × D2 F1 × F2 = D1 × D2 F1 + D1 = F2 + D2 F1 + D1 = F2 + D2 Question 19 A)What can a car manufacturer do to increase the mechanical advantage of a steering wheel?(1 point) Responses shorten the axle length of the steering wheel shorten the axle length of the steering wheel lengthen the axle length of the steering wheel lengthen the axle length of the steering wheel decrease the radius of the steering wheel decrease the radius of the steering wheel increase the radius of the steering wheel increase the radius of the steering wheel Question 20 A)Taylor says he likes using simple machines because they do his work for him. Alicia says that simple machines only help do the work, but do not do the work for you. Which best describes who is correct?(1 point) Responses Alicia is correct because simple machines use electricity to help perform jobs. Alicia is correct because simple machines use electricity to help perform jobs. Taylor is correct because simple machines are always used without anyone touching them. Taylor is correct because simple machines are always used without anyone touching them. Taylor is correct because simple machines are always used in factories and don't require work. Taylor is correct because simple machines are always used in factories and don't require work. Alicia is correct because simple machines change the amount of work required, but still require work. Alicia is correct because simple machines change the amount of work required, but still require work. Question 21 A)If a large force is exerted on an object, when is no work performed?(1 point) Responses when the object moves when the object moves when the object does not move when the object does not move when the power is too large when the power is too large when there is no friction when there is no friction

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Here are the answers to the questions:

Question 1 A

Response: The work done by each force is negative. (This is not possible because if two forces are acting in the same direction and causing an increase in speed, at least one of them must be doing positive work.)

Question 2 A

Responses:

Lifting a bag of groceries

Carrying a box up a flight of stairs

Lifting a rock off the ground

Pushing a grocery cart through the store

Question 3 A

Responses:

Work: Using force to change the energy of an object

Power: The rate at which work is done

Joule: The metric unit of work and energy

Watt: The metric unit of power

Machine: Any device that makes work easier to do

Mechanical Advantage: The number to represent how by how much a machine increases the input force

Efficiency: The ratio of output work of a machine to the input work of a machine

Energy: The ability to do work

Question 4 A

Response: He does work as he picks up the book and as he lifts it to the shelf.

Question 5 A

Responses:

The time needed to do the work

The direction of a force

The distance over which a force is applied

Question 6 A

Response: Reducing friction.

Question 7 A

Responses:

Pulley: A simple machine that consists of a rope that fits into a groove in a wheel.

Wheel and Axle: A simple machine that consists of two disks or cylinders, each one with a different radius.

Lever: A rigid bar that is free to move around a fixed point called a fulcrum.

Inclined Plane: A slanted surface along which a force moves an object to a different elevation.

Screw: An inclined plane wrapped around a cylinder.

Wedge: A V-shaped object whose sides are two inclined planes sloped toward each other.

Question 8 A

Response: Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load.

Question 9 A

Response: It allows a smaller force to be applied over a longer distance.

Question 10 A

Response: 7

Question 11 A

Response: 10.5 feet (Mechanical Advantage = Length of Ramp / Height of Ramp; Hence, 1.5 = x / 7 → x = 10.5)

Question 12 A

Response: 7

Question 13 A

Response: 2.0

Question 14 A

Response: 3.0

Question 15 A

Response: 9.0 J (Work = Force × Distance; Hence, Work = 6 N × 1.5 m = 9.0 J)

Question 16 A

Response: 48 J (Work = 12 N × 4 m = 48 J)

Question 17 A

Response: Marla did more work than Jaxon because she walked a longer distance.

Question 18 A

Response: F1 × D1 = F2 × D2

Question 19 A

Response: Increase the radius of the steering wheel.

Question 20 A

Response: Alicia is correct because simple machines change the amount of work required, but still require work.

Question 21 A

Response: When the object does not move.

Let me know if you have further questions or need assistance!

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Question 1 A) Two forces F1 and F2 with the same magnitude act on a particle along the same axis. This results in the speed of the particle increasing in the positive direction. Which one of the following is NOT possible? (1 point) Responses The work done by F1 is positive, and the work done by F2 is zero. The work done by F1 is positive, and the work done by F2 is zero. The work done by F1 is zero, and the work done by F2 is positive. The work done by F1 is zero, and the work done by F2 is positive. The work done by each force is negative The work done by each force is negative The work done by F1 is positive, and the work done by F2 is negative. The work done by F1 is positive, and the work done by F2 is negative. Question 2 A)Which of the following are examples of work being done on an object? Choose the 4 that apply.(4 points) Responses holding a 50 kg barbell over your head holding a 50 kg barbell over your head lifting a bag of groceries lifting a bag of groceries pushing on a car that will not move pushing on a car that will not move carrying a box up a flight of stairs. carrying a box up a flight of stairs. lifting a rock off the ground lifting a rock off the ground wind blowing against a tree wind blowing against a tree pushing a grocery cart through the store pushing a grocery cart through the store Question 3 A)Match each term to its correct description.(8 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. Work Power Joule Watt Machine Mechanical Advantage Efficiency Energy Using force to change the energy of an objectThe rate at which work is doneThe metric unit of work and energyThe metric unit of powerAny device that makes work easier to do The number to represent how by how much a machine increases the input forceThe ratio of output work of a machine to the input work of a machineThe ability to do work Question 4 A) Adam lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adam doing work on the book? Work = Force x Distance (1 point) Responses He does work on the book at no time during this process. He does work on the book at no time during this process. He does work only while he carries the book across the room. He does work only while he carries the book across the room. He does work from the moment he touches the book until he lets it go. He does work from the moment he touches the book until he lets it go. He does work as he picks up the book and as he lifts it to the shelf. He does work as he picks up the book and as he lifts it to the shelf. Question 5 A)How does a machine make work easier? A machine makes work easier by changing _______. Choose the three statements that apply.(3 points) Responses the amount of work done the amount of work done the amount of work done the amount of work done the time needed to do the work the time needed to do the work the direction of a force the direction of a force the distance over which a force is applied the distance over which a force is applied Question 6 A)The efficiency of a machine can be increased by:(1 point) Responses decreasing distance. decreasing distance. decreasing force. decreasing force. reducing friction. reducing friction. reducing work. reducing work. Question 7 A)Match the term/picture with the correct description(12 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. A simple machine that consists of a rope that fits into a groove in a wheel. A simple machine that consists of two disks or cylinders, each one with a different radius. A jar lid The blade of a knife A broom handle A rigid bar that is free to move around a fixed point called a fulcrum. A slanted surface along which a force moves an object to a different elevation. An inclined plane wrapped around a cylinder. A V-shaped object whose sides are two inclined planes sloped toward each other. PulleyWheel and AxleInclined PlanePulleyScrewWheel and AxleWedgeLeverLeverInclined PlaneScrewWedge Question 8 A) A wheelbarrow can be used to help lift a load and push the load across a distance. The fulcrum is located at the opposite end where the effort is applied and the load (whatever is in the wheelbarrow) is in the middle of the fulcrum and effort. What kind of lever is the wheelbarrow? (1 point) Responses Class 1 Lever - The fulcrum is located between the effort and the load. Class 1 Lever - The fulcrum is located between the effort and the load. Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load. Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load. Class 3 Lever - The effort lies between the load and the fulcrum. Class 3 Lever - The effort lies between the load and the fulcrum. Question 9 A)How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?(1 point) Responses It allows a larger force to be applied over a shorter distance. It allows a larger force to be applied over a shorter distance. It allows a larger force to be applied over a longer distance. It allows a larger force to be applied over a longer distance. It allows a smaller force to be applied over a shorter distance. It allows a smaller force to be applied over a shorter distance. It allows a smaller force to be applied over a longer distance. It allows a smaller force to be applied over a longer distance. Question 10 A) What is the mechanical advantage of the class 1 lever? Input = Effort Output = Load (1 point) Responses 2 2 4050 4050 0.5 0.5 67.5 67.5 12.5 12.5 Question 11 A) The inclined plane below is being used to lift a box 7 ft. The inclined plane has a mechanical advantage of 1.5. What is the length, x, of the inclined plane? mechanical advantage = (length of ramp)/(height of ramp) (1 point) Responses .25 feet .25 feet 2.5 feet 2.5 feet 7.5 feet 7.5 feet 10.5 feet 10.5 feet Question 12 A) What is the mechanical advantage if the radius of the wheel is 49 cm and the radius of the axle is 7 cm? MA = Radius of Wheel / Radius of the Axle (1 point) Responses 3 3 7 7 16 16 21 21 Question 13 A) Johnny Lumberjack uses a mallet and wedge to help him split wood. The picture shows the mallet and wedge. Johnny Lumberjack uses the wedge because it is a simple machine that provides a mechanical advantage. What is the mechanical advantage of the wedge? Mechanical Advantage= length of sloped side/width of wedge (1 point) Responses 0.5 0.5 2.0 2.0 4.5 4.5 8.0 8.0 Question 14 A) Josh opens a soda can by pulling on the tab. The picture shows Josh opening the soda can. The tab is a simple machine. What is the mechanical advantage of the tab? MA = output/input (1 point) Responses 0.7 0.7 3.0 3.0 9.0 9.0 21.0 21.0 Question 15 A) Maddie is on the weightlifting team at her school. She must lift as much weight as possible from the ground to a straight up standing position. How much work will Maddie do if she uses a force of 6 N to lift 150 kg of weight to a height of 1.5 m? Work = Force x Distance (1 point) Responses 3.3 J 3.3 J 3.5 J 3.5 J 6.5 J 6.5 J 9.0 J 9.0 J Question 16 A) A student used 12 newtons of force to push a box 4 meters down the driveway. Using the formula, how much work, measured in joules (J), did they do to move the box? Work = force × distance (1 point) Responses 3 J 3 J 8 J 8 J 16 J 16 J 48 J 48 J Question 17 A) Marla and Jaxon are hiking outside. Jaxon runs in a straight line up a hill, but Marla walks in circles around the hill until she makes it to the top. The picture shows the paths Jaxon and Marla take. Marla told Jaxon she used a simple machine, an inclined plane, to walk up the hill. Which statement best compares Marla's and Jaxon's methods of climbing the hill? (1 point) Responses Jaxon did more work than Marla because he ran quickly up the hill. Jaxon did more work than Marla because he ran quickly up the hill. Marla did more work than Jaxon because she walked a longer distance. Marla did more work than Jaxon because she walked a longer distance. Marla and Jaxon did the same amount of work, but Marla had less of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had less of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had more of a mechanical advantage. Marla and Jaxon did the same amount of work, but Marla had more of a mechanical advantage. Question 18 A) The diagram below shows a balanced lever with boxes on either end. What equation would reflect that the lever is balanced? (1 point) Responses F1 × D1 = F2 × D2 F1 × D1 = F2 × D2 F1 + F2 = D1 + D2 F1 + F2 = D1 + D2 F1 × F2 = D1 × D2 F1 × F2 = D1 × D2 F1 + D1 = F2 + D2 F1 + D1 = F2 + D2 Question 19 A)What can a car manufacturer do to increase the mechanical advantage of a steering wheel?(1 point) Responses shorten the axle length of the steering wheel shorten the axle length of the steering wheel lengthen the axle length of the steering wheel lengthen the axle length of the steering wheel decrease the radius of the steering wheel decrease the radius of the steering wheel increase the radius of the steering wheel increase the radius of the steering wheel Question 20 A)Taylor says he likes using simple machines because they do his work for him. Alicia says that simple machines only help do the work, but do not do the work for you. Which best describes who is correct?(1 point) Responses Alicia is correct because simple machines use electricity to help perform jobs. Alicia is correct because simple machines use electricity to help perform jobs. Taylor is correct because simple machines are always used without anyone touching them. Taylor is correct because simple machines are always used without anyone touching them. Taylor is correct because simple machines are always used in factories and don't require work. Taylor is correct because simple machines are always used in factories and don't require work. Alicia is correct because simple machines change the amount of work required, but still require work. Alicia is correct because simple machines change the amount of work required, but still require work. Question 21 A)If a large force is exerted on an object, when is no work performed?(1 point) Responses when the object moves when the object moves when the object does not move when the object does not move when the power is too large when the power is too large when there is no friction when there is no friction

1 answer

Here are the answers to the questions:

Question 1 A

Response: The work done by each force is negative. (This is not possible because if two forces are acting in the same direction and causing an increase in speed, at least one of them must be doing positive work.)

Question 2 A

Responses:

Lifting a bag of groceries
Carrying a box up a flight of stairs
Lifting a rock off the ground
Pushing a grocery cart through the store

Question 3 A

Responses:

Work: Using force to change the energy of an object
Power: The rate at which work is done
Joule: The metric unit of work and energy
Watt: The metric unit of power
Machine: Any device that makes work easier to do
Mechanical Advantage: The number to represent how by how much a machine increases the input force
Efficiency: The ratio of output work of a machine to the input work of a machine
Energy: The ability to do work

Question 4 A

Response: He does work as he picks up the book and as he lifts it to the shelf.

Question 5 A

Responses:

The time needed to do the work
The direction of a force
The distance over which a force is applied

Question 6 A

Response: Reducing friction.

Question 7 A

Responses:

Pulley: A simple machine that consists of a rope that fits into a groove in a wheel.
Wheel and Axle: A simple machine that consists of two disks or cylinders, each one with a different radius.
Lever: A rigid bar that is free to move around a fixed point called a fulcrum.
Inclined Plane: A slanted surface along which a force moves an object to a different elevation.
Screw: An inclined plane wrapped around a cylinder.
Wedge: A V-shaped object whose sides are two inclined planes sloped toward each other.

Question 8 A

Response: Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load.

Question 9 A

Response: It allows a smaller force to be applied over a longer distance.

Question 10 A

Response: 7

Question 11 A

Response: 10.5 feet (Mechanical Advantage = Length of Ramp / Height of Ramp; Hence, 1.5 = x / 7 → x = 10.5)

Question 12 A

Response: 7

Question 13 A

Response: 2.0

Question 14 A

Response: 3.0

Question 15 A

Response: 9.0 J (Work = Force × Distance; Hence, Work = 6 N × 1.5 m = 9.0 J)

Question 16 A

Response: 48 J (Work = 12 N × 4 m = 48 J)

Question 17 A

Response: Marla did more work than Jaxon because she walked a longer distance.

Question 18 A

Response: F1 × D1 = F2 × D2

Question 19 A

Response: Increase the radius of the steering wheel.

Question 20 A

Response: Alicia is correct because simple machines change the amount of work required, but still require work.

Question 21 A

Response: When the object does not move.

Let me know if you have further questions or need assistance!

Ask a New Question or answer this question.

GPT-4o mini · Answer

Here are the answers to the questions: ### Question 1 A **Response:** The work done by each force is negative. (This is **not possible** because if two forces are acting in the same direction and causing an increase in speed, at least one of them must be doing positive work.) ### Question 2 A **Responses:** 1. Lifting a bag of groceries 2. Carrying a box up a flight of stairs 3. Lifting a rock off the ground 4. Pushing a grocery cart through the store ### Question 3 A **Responses:** - Work: Using force to change the energy of an object - Power: The rate at which work is done - Joule: The metric unit of work and energy - Watt: The metric unit of power - Machine: Any device that makes work easier to do - Mechanical Advantage: The number to represent how by how much a machine increases the input force - Efficiency: The ratio of output work of a machine to the input work of a machine - Energy: The ability to do work ### Question 4 A **Response:** He does work as he picks up the book and as he lifts it to the shelf. ### Question 5 A **Responses:** 1. The time needed to do the work 2. The direction of a force 3. The distance over which a force is applied ### Question 6 A **Response:** Reducing friction. ### Question 7 A **Responses:** - Pulley: A simple machine that consists of a rope that fits into a groove in a wheel. - Wheel and Axle: A simple machine that consists of two disks or cylinders, each one with a different radius. - Lever: A rigid bar that is free to move around a fixed point called a fulcrum. - Inclined Plane: A slanted surface along which a force moves an object to a different elevation. - Screw: An inclined plane wrapped around a cylinder. - Wedge: A V-shaped object whose sides are two inclined planes sloped toward each other. ### Question 8 A **Response:** Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load. ### Question 9 A **Response:** It allows a smaller force to be applied over a longer distance. ### Question 10 A **Response:** 7 ### Question 11 A **Response:** 10.5 feet (Mechanical Advantage = Length of Ramp / Height of Ramp; Hence, 1.5 = x / 7 → x = 10.5) ### Question 12 A **Response:** 7 ### Question 13 A **Response:** 2.0 ### Question 14 A **Response:** 3.0 ### Question 15 A **Response:** 9.0 J (Work = Force × Distance; Hence, Work = 6 N × 1.5 m = 9.0 J) ### Question 16 A **Response:** 48 J (Work = 12 N × 4 m = 48 J) ### Question 17 A **Response:** Marla did more work than Jaxon because she walked a longer distance. ### Question 18 A **Response:** F1 × D1 = F2 × D2 ### Question 19 A **Response:** Increase the radius of the steering wheel. ### Question 20 A **Response:** Alicia is correct because simple machines change the amount of work required, but still require work. ### Question 21 A **Response:** When the object does not move. Let me know if you have further questions or need assistance!