Friction: Crash Course Physics #6

What is the reason you can pick up a cup, without it slipping through your fingers? 

• mass

• friction

• gravity

Is friction a force? 

• No

• Yes

What are the two types of friction (click all that apply)?

• Potential

• Static

• Kinetic

What can kinetic friction often generate? 

• sound and light

• light and heat

• heat and sound

Why do you think it is harder to move something against a rougher surface? 

• Because more friction is produced

• Because it makes the object weigh more

• Because there is more gravitational force 

What does equilibrium mean? 

• the forces on the object are weaker on one side

• the forces on the object are stronger on one side

• the forces on the object balance out

When you and your friend start to push against a bookcase and it moves, that means you have overcome the ________ friction.

• sliding

• static

• fluid