There are _________ types of friction.

• 2

• 1

• 4

• 5

The rougher the surface, the faster an object will travel over the surface

• True

• False

Which of these materials do you predict would have the MOST amount of friction?

• metal

• tile

• sand paper

• denim

Swimming fish experience-

• Rolling Friction

• Sliding Friction

• Fluid Friction

• Static Friction

Rough surfaces have _________

• greater friction

• same friction

• the same lvel of friction

True or False: objects that are smooth have LESS friction than objects that are rough

• True

• False

Sally experiences-

• Rolling Friction

• Sliding Friction

• Fluid Friction

• Static Friction

Wheels on a skateboard most likely experiences-

• Rolling Friction

• Sliding friction

• Fluid Friction

• Static Friction

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

• opposite

• similar

• parallel

• west

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