Friction

Front

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

Back

opposite

Front

How does friction affect speed?

Back

More friction decreases speed.

Front

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

Back

True

Front

The rougher the surface, the faster an object will travel over the surface. True or False?

Back

False

Front

When most objects with smooth surfaces rub, there is less friction.

Back

True

Front

What does friction produce?

Back

heat

Front

What is the unit called that measures force?

Back

Newton

Front

Which of the following would increase the motion of a ball after it is kicked? Options: a flat, grassy surface, a smooth surface sloped uphill, a smooth surface sloped downhill

Back

a smooth surface sloped downhill

Front

Why are new tires on a car better than older, worn tires?

Back

New tires provide more friction on the road than older tires.

Front

A person is pushing a lawnmower. Which best describes what is occurring?

Back

Force is being applied to the lawnmower.