Friction

Front

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

Back

opposite

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? 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

Which of the following is an example of friction that is harmful? Options: Pencil marking on paper, Engine parts wearing out, sand placed on ice in the winter, Using an eraser to erase marks

Back

Engine parts wearing out

Front

Rougher surfaces have ...

Back

greater friction

Front

How does friction affect speed?

Back

More friction decreases speed.

Front

Without friction, an object in motion would never stop.

Back

True

Front

You can walk because there is friction between your __________ and ______________

Back

feet and ground

Front

Does friction help you write on a paper or blackboard?

Back

True

Front

What is the unit called that measures force? Options: weight, meter, Newton, kilogram

Back

Newton