5. Friction

How does friction affect speed?

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

A type of friction that occurs when air pushes against a moving object causing it to decelerate.

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.

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

What type of friction is not moving? Options: static, sliding, fluid, rolling

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

What does friction produce?

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

Which would make a car move fastest? Options: moving up a steep slope, moving up a gradual slope, moving down a steep slope, moving down a gradual slope