d) Liming
3.
Statement (A) : Kinetic friction on a body is proportional to the normal reaction on the body
Statement (B) : Static friction on a body is proportional to the normal reaction on the body
a) both A and B are true
b) both A and B are false
[
c) A is true but B is false
d) B is true but A is false
Assertion (A) : Coefficient of friction is unit less
Reason (R) It is equal to ratio of same physical quantities (u = f/N)
4.
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Answer:
3rd one option a
4th one also option a
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