uestion 1 (3 points)

Question

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What is the function of ball bearings when explaining friction?

Question 1 options:

it causes friction to stay the same

it causes frictions to increase

it causes friction to decrease

Question 2 (3 points)

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An example of fluid friction only is

Question 2 options:

the little mermaid swimming through the ocean

using oil to lubricate wheels on a car

dragging your sister across the floor on a blanket

wheels on your skateboard

Question 3 (3 points)

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When a mover puts furniture on wheels, which type of friction is the mover using to make the job easier?

Question 3 options:

gravitational friction

static friction

rolling kinetic friction

sliding kinetic friction

Question 4 (3 points)

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Which two factors determine the strength of the force of friction?

Question 4 options:

speed and light

how hard the surfaces push together and the types of surfaces involved

how big the objects are and their surface area

how fast the objects are going and on what planet

Question 5 (3 points)

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Which of the following is not a type of friction?

Question 5 options:

fluid

lifting

static

sliding

Question 6 (3 points)

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Which of the following sports would friction be needed the most?

Question 6 options:

swimming

skiing

basketball

skating

Question 7 (3 points)

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Match the correct definition with the correct term.

Question 7 options:

acceleration

friction

gravity

force

1.
a force that always acts to oppose motion

2.
the force of attraction between two objects

3.
a push or pull that always acts on an object

4.
a change in moving object's speed or direction

Question 8 (3 points)

Listen
Which is an example of rolling friction?

Question 8 options:

using oil to lubricate

dragging your sister across the floor on a blanket

the little mermaid swimming through the ocean

wheels on your skateboard

Question 9 (3 points)

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How does a force produce a change in motion?

Question 9 options:

gravitational force

unbalanced force

fricitional force

balanced force

Question 10 (3 points)

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What is an object that appears to stay in place and that helps you detect motion in another object?

Question 10 options:

a newton

a black hole

a reference point

a lubricant

Question 11 (3 points)

Listen
Which is an example of friction that is helpful?

Question 11 options:

the erosion of soil by wind

holes developing in your socks

tires moving a car forward

car engine parts wearing out

Question 12 (3 points)

Listen
Which surface will produce the least amount of friction?

Question 12 options:

grassy soccer field

smooth glass tabletop

carpeted living room floor

gravel running track

Question 13 (3 points)

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What unbalanced force can cause an object's motion to change?

Question 13 options:

changing direction or speed; starting but not stopping motion.

changing direction or speed, starting or stopping motion.

changing direction or speed; stopping but not starting motion.

changing direction or speed only.

Question 14 (3 points)

Listen
Why is it easy to slip when there is water on the floor?

Question 14 options:

The water is a lubricant and reduces the friction between your feet and the floor.

The friction between our feet and the floor changes from sliding kinetic friction to rolling kinetic friction.

The friction between your feet and the floor changes from kinetic to static friction.

The water increases the friction between your feet and the floor.

Question 15 (3 points)

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Which of the following factors causes friction to occur when in direct contact with an object?

Question 15 options:

adding wheels to roll

the roughness of any object's surface

less air resistance

the weights of any two objects

Answer 1

Sure! Here are the answers to the questions based on your provided options:

Question 1: What is the function of ball bearings when explaining friction?

• Answer: it causes friction to decrease

Question 2: An example of fluid friction only is

• Answer: the little mermaid swimming through the ocean

Question 3: When a mover puts furniture on wheels, which type of friction is the mover using to make the job easier?

• Answer: rolling kinetic friction

Question 4: Which two factors determine the strength of the force of friction?

• Answer: how hard the surfaces push together and the types of surfaces involved

Question 5: Which of the following is not a type of friction?

• Answer: lifting

Question 6: Which of the following sports would friction be needed the most?

• Answer: skiing

Question 7: Match the correct definition with the correct term.

• 1. friction - a force that always acts to oppose motion
• 2. gravity - the force of attraction between two objects
• 3. force - a push or pull that always acts on an object
• 4. acceleration - a change in moving object's speed or direction

Question 8: Which is an example of rolling friction?

• Answer: wheels on your skateboard

Question 9: How does a force produce a change in motion?

• Answer: unbalanced force

Question 10: What is an object that appears to stay in place and that helps you detect motion in another object?

• Answer: a reference point

Question 11: Which is an example of friction that is helpful?

• Answer: tires moving a car forward

Question 12: Which surface will produce the least amount of friction?

• Answer: smooth glass tabletop

Question 13: What unbalanced force can cause an object's motion to change?

• Answer: changing direction or speed, starting or stopping motion.

Question 14: Why is it easy to slip when there is water on the floor?

• Answer: The water is a lubricant and reduces the friction between your feet and the floor.

Question 15: Which of the following factors causes friction to occur when in direct contact with an object?

• Answer: the roughness of any object's surface

Feel free to reach out if you have more questions!