Friction

Front

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

Back

True

Front

Which of the following is an example of friction that is helpful? Options: Brakes used on a bike, Tires from a car on the road, Tread on the bottom of your shoes

Back

All are examples that are helpful

Front

How would the absence of friction affect a marble traveling on a long, straight path? Options: The marble’s speed would decrease., The marble’s speed would increase., The marble would stop immediately., The marble would remain at constant speed.

Back

The marble would remain at constant speed.

Front

Rougher surfaces have ...

Back

greater friction

Front

How does friction affect speed? Options: more friction decreases speed, more friction increases speed, less friction decreases speed, less friction doesn't affect speed

Back

more friction decreases speed

Front

What is a contact force?

Back

objects physically touching

Front

Friction is a

Back

Contact Force

Front

What forces caused a ball's motion when it rolls down a grassy hill, reaches the bottom, continues to roll, and then slows down to a stop?

Back

Gravity caused the ball to roll down the hill, but frictional force caused the ball to slow down and stop.

Front

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

Back

False

Front

The force that acts in the opposite direction of motion when two surfaces come in contact.

Back

Friction