Question

A
A Tick() the correct answer:
1. Static friction comes to play when the object is:
(a) Rolling
B.
(b) Sliding
(d) None
(c) Moves from rest
2. Rolling friction comes to play when the object is :
(b) Sliding
(a) Rolling
(c) Comes to rest
(d) All of these
3. In many machines, friction is reduced by using :
(a) Ball-Bearing
(b) Lubricants
(c) Both a & b
c
(d) None
4. A ball is rolling in north direction. In which direction, does the frictional force acta
(a) North
(b) South
(c) East
(d) West
Match the following:
B.​

Answer 1

Answer:

1.c.Comes To Rest

2.a.Rolling

3.c.Both a and b

4.b.South

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