Question
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
Question
Johnny Lumberjack uses a mallet and wedge to help him split wood. The picture shows the mallet and wedge.
8 cm by 16 cm
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
Josh opens a soda can by pulling on the tab. The picture shows Josh opening the soda can.
5 cm by 15 cm
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
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
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
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.
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
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.
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
MA = Radius of Wheel / Radius of the Axle
(1 point)
Responses
3
3
7
7
16
16
21
Question
Johnny Lumberjack uses a mallet and wedge to help him split wood. The picture shows the mallet and wedge.
8 cm by 16 cm
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
Josh opens a soda can by pulling on the tab. The picture shows Josh opening the soda can.
5 cm by 15 cm
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
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
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
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.
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
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.
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
Answers
GPT-4o mini
Here are the answers to your questions based on the principles of physics related to mechanical advantage and work:
1. **Mechanical Advantage of Wheel and Axle:**
- Given: Radius of the wheel = 49 cm, Radius of the axle = 7 cm
- MA = Radius of Wheel / Radius of the Axle = 49 cm / 7 cm = 7
- **Response:** 7
2. **Mechanical Advantage of the Wedge:**
- Given: Length of sloped side (hypotenuse) = 16 cm, Width of wedge = 8 cm
- Mechanical Advantage = length of sloped side / width of wedge = 16 cm / 8 cm = 2
- **Response:** 2.0
3. **Mechanical Advantage of the Tab:**
- Given: Output = 15 cm, Input = 5 cm
- MA = output/input = 15 cm / 5 cm = 3
- **Response:** 3.0
4. **Work Done by Maddie:**
- Given: Force = 6 N, Height = 1.5 m (Distance)
- Work = Force x Distance = 6 N x 1.5 m = 9 J
- **Response:** 9.0 J
5. **Work Done by the Student on the Box:**
- Given: Force = 12 N, Distance = 4 m
- Work = force × distance = 12 N × 4 m = 48 J
- **Response:** 48 J
6. **Comparison of Methods for Climbing the Hill:**
- **Response:** Marla did more work than Jaxon because she walked a longer distance.
7. **Increasing Mechanical Advantage of a Steering Wheel:**
- **Response:** increase the radius of the steering wheel
8. **Who is Correct about Simple Machines?**
- **Response:** Alicia is correct because simple machines change the amount of work required, but still require work.
9. **Condition for No Work Performed:**
- **Response:** when the object does not move
Please feel free to ask if you have more questions or need further clarification!
1. **Mechanical Advantage of Wheel and Axle:**
- Given: Radius of the wheel = 49 cm, Radius of the axle = 7 cm
- MA = Radius of Wheel / Radius of the Axle = 49 cm / 7 cm = 7
- **Response:** 7
2. **Mechanical Advantage of the Wedge:**
- Given: Length of sloped side (hypotenuse) = 16 cm, Width of wedge = 8 cm
- Mechanical Advantage = length of sloped side / width of wedge = 16 cm / 8 cm = 2
- **Response:** 2.0
3. **Mechanical Advantage of the Tab:**
- Given: Output = 15 cm, Input = 5 cm
- MA = output/input = 15 cm / 5 cm = 3
- **Response:** 3.0
4. **Work Done by Maddie:**
- Given: Force = 6 N, Height = 1.5 m (Distance)
- Work = Force x Distance = 6 N x 1.5 m = 9 J
- **Response:** 9.0 J
5. **Work Done by the Student on the Box:**
- Given: Force = 12 N, Distance = 4 m
- Work = force × distance = 12 N × 4 m = 48 J
- **Response:** 48 J
6. **Comparison of Methods for Climbing the Hill:**
- **Response:** Marla did more work than Jaxon because she walked a longer distance.
7. **Increasing Mechanical Advantage of a Steering Wheel:**
- **Response:** increase the radius of the steering wheel
8. **Who is Correct about Simple Machines?**
- **Response:** Alicia is correct because simple machines change the amount of work required, but still require work.
9. **Condition for No Work Performed:**
- **Response:** when the object does not move
Please feel free to ask if you have more questions or need further clarification!