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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 In the system of two blocks of equla masses as shown, the coefficient of friction between the blocks `(mu_(2))` is less than coefficient of friction `(mu_(1))` between lower block and ground. For all values of force F applied on upper block, lower block remains at rest.
Reason Frictional force on lower block due to upper block is not sufficient to overcome the frictional force on lower block due to ground.

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:
A
(a) `(f_(2))_("max")=mu_(2) mg`
`(f_(1))_("max")-mu_(1)(2m)(g)`
Since `(f_(1))_("max")gt (f_(2))_("max")`
Lower block will not move at all.
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