Friction

Friction Worksheet-1

1. Friction opposes the_____ between the surfaces in contact with each other.

2. Friction depends on the _____of surfaces.

3. Friction produces____.

4. Sprinkling of powder on the carom board _____ friction.

5. Sliding friction is_____ than the static friction.

6. The friction always_____ the direction of motion.

Friction Worksheet-2

1. Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below. Choose the correct arrangement:

A. rolling, static, sliding              B. rolling, sliding, static

C. static, sliding, rolling              D. sliding, static, rolling

2. Kimy runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be

A. Wet marble floor, dry marble floor, newspaper, towel.

B. Newspaper, towel, dry marble floor, wet marble floor.

Friction Worksheet-3

1. Suppose your writing desk is tilted a little, a book kept on it starts sliding down. Show the direction of frictional force acting on it.

2. You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk or run on the floor? Why?

3. Explain why sportsmen use shoes with spikes.

4. A has to push a lighter box and B has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?

5. Explain why sliding friction is less than static friction.