Search any question & find its solution
Question:
Answered & Verified by Expert
Assertion: The velocity of a body at the bottom of an inclined plane of given height is more when it slides down the plane compared to when it is rolling down the same plane.
Reason: In rolling down, a body acquires both kinetic energy of translation and rotation.
Options:
Reason: In rolling down, a body acquires both kinetic energy of translation and rotation.
Solution:
1278 Upvotes
Verified Answer
The correct answer is:
If both assertion and reason are true but reason is not the correct explanation of assertion.
When a body slides, its entire PE is converted into KE of translation. But when it rolls down, some part of its PE is converted into its $\mathrm{KE}$ of rotation, thereby reducing its $\mathrm{KE}$ of translation and hence its linear velocity.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.