Friction - 8th Grade Science

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

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

• True
• False

Rougher surfaces have ...

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

Without friction, an object in motion would never stop.

• true

• false

Friction is a type of force. True or False?

• True

• False

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

• similar
• opposite
• parallel
• west

One of the things that the amount of friction depends on is the weight of the objects pressing together.

• True

• False

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

What is a friction force acting upon an object on wheels?

• Static 
• Sliding 
• Rolling 
• Fluid 

Swimming fish experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction