Question

Assertion :The time of ascent for a body projected to move up a rough inclined plane is less than the time of descent Reason: The retardation for upward motion is more than the acceleration for down motion

• 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

Answer 1

Answer: (B)

While moving up: the opposing forces are gravity + friction
While moving down: it is only friction and also gravity is supporting force.
Friction is same in both the cases.
So, The time of ascent for a body projected to move up a rough inclined plane is less than the time of decent as it receives more retardation.