Friction

Question 1

Friction …….

1. doesn’t affect a moving object
2. slows a moving object
3. speeds up a moving object
4. starts an object moving

Answer 1

2. slows a moving object

Question 2

In which direction does friction act in relation to movement?

Answer 2

In the opposite direction to the direction of movement

Question 3

List 3 ways friction is useful?

Answer 3

friction between our shoes and the floor stop us from slipping

friction between tyres and the road stop cars from skidding

friction between the brakes and wheel help bikes and cars slow down

Question 4

Why does friction give tyres a ‘lifetime’?

Answer 4

It wears away the rubber on the tyres till they are no longer useful

Question 5

Does an icy road have more or less friction than a normal road?

Answer 5

Less. Frictional forces are much smaller on smooth surfaces.

Question 6

How can we reduce friction?

Answer 6

Lubricants like water and oil reduce friction

Question 7

Which arrow represents friction and air resistance?

Answer 7

F1

Question 8

Which of the following is a ‘force’?

1- friction

2- electricity

3- light

4- kinetic

Answer 8

Friction

Question 9

As a cyclist speeds up what happens to the frictional force on her tyres?

Answer 9

The frictional force increases.