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These questions consists of two statemen...

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following four responses
Assertion A body of mass 10 kg is placed on a rough inclined surface `(mu=0.7)`. The surface is inclined to horizontal at angle `30^(@)`. Acceleration of the body down the plane will be zero.
Reason Work done by friction is always negative.

A

If both Assertion and reason are true and the reason is a correct explanation of the assertion.

B

If both Assertion and reason are true and the reason is not the correct explanation of the assertion.

C

if assertion is true but reason is false

D

if assertion is false but reason is true

Text Solution

Verified by Experts

The correct Answer is:
C
( c) `mg sin theta=10xx10xx(1)/(2)=50N`
`mu mg cos theta=0.7xx10xx10xx(sqrt(3))/(2)=60.62N`
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