Friction Revision Questions

It is difficult to walk on an oily floor because

• Floor gets spoiled

• There is more resistance

• Force of friction is high

• Force of friction is very less

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

• similar
• opposite
• parallel
• west

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

• True
• False

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
• All are examples that are helpful

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

When we rub our hands together _________.

• frictional force works between them

• energy is released

• our hands become warm

• all off the above

What does friction produce?

• light
• sound
• heat
• gravity

How do you lower the friction force?

• By a smooth surface
• By a rough surface
• By not pushing hard
• By pushing down

On which surface will a toy car travel the furthest?

• Carpet
• Polished Wood
• Ice

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

• ground and air

• feet and ground

• feet and air

• air and ground