Friction

Front

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

Back

opposite

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, All are examples that are helpful

Back

All are examples that are helpful

Front

Rougher surfaces have ...

Back

greater friction

Front

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

Back

TRUE

Front

What does friction produce?

Back

heat

Front

What causes an object to fall faster? Options: Smaller surface area, Larger surface area, If it has a parachute, If it is softer

Back

Smaller surface area

Front

The larger the surface area of the moving object, the ___________ air resistance there is.

Back

More

Front

Air resistance pushes against falling objects and _________________.

Back

Slows them down

Front

When dropped from the same distance, which will fall to the floor faster?

Back