Friction Practice

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

The amount of friction depends on the weight of the objects pressing together.

• True
• False

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

Which of the following is an example of friction that is harmful?

• Pencil marking on paper
• Engine parts wearing out
• sand placed on ice in the winter
• Using an eraser to erase marks

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

How does friction affect speed?

• more friction decreases speed

• more friction doesn't affect speed

• less friction decreases speed

• less friction doesn't affect speed

Tags

NGSS.3-PS2-1

without friction, an object in motion would never stop

• true

• false

you can walk because there is friction between your __________ and ______________

• ground and air

• feet and ground

• feet and air

• air and ground

Friction helps you write on a paper or the white board.

• true

• false

 What is the unit called that measures friction?

• weight

• meter

• newton

• kilogram