Question

I. Answer the following questions. 4M

1. Rolling friction is _____than sliding friction.

2. Graphite powder is used in some machines to ____ friction.

3. We want to reduce friction in order to increase ______.

4. To reduce friction between rotating shafts we use ______.

II. Answer the following questions . 6M.

5. What is called the principle of ball bearings?

6. What is rolling friction?

7. Can we reduce friction to zero, explain?​

Answer 1

Answer:

1. less

2. reduce

3. speed

4. ball bearing

5. ball bearing are used for reducing rotational friction

6. rolling friction is the force resisting the motion when a body rolls on a surface.

7. no we cannot reduce friction to 0 because friction exists at even atomic levels too. Friction cannot be reduced to perfect 0, if two surfaces are touching each other they always have some pressure.

hope this helped you dear

Answer 2

Answer:

Refer the attachment for your answer

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