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>>Physics
>>Laws of Motion
>>Problems on Friction
>> $The acceleration of a body moving up a r$

Question

Assertion

The acceleration of a body moving up a rough inclined plane when it is pulled up by a force, depends only on its mass.

Reason

Frictional force acts in the direction of the applied force.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

C

Assertion is correct but Reason is incorrect

D

Both Assertion and Reason are incorrect

Medium

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Solution

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Correct option is D)

The force required to move a body up an inclined plane having coefficient of friction $μ$ is given by:
$F = m g (s i n α + μ c o s α)$ . So the acceleration of the body will be:
$a = F / m = g (s i n α + μ c o s α)$ which is independent of its mass.

in this case friction acts opposite to the applied force.

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