Home Maths JEE Main Full Syllabus Mock Test 75 Question New Syllabus. TEST 9 PCM A metre stick of length is held vertically …
Maths JEE Main Full Syllabus Mock Test 75 Question New Syllabus. TEST 9 PCM Single Correct MCQ
Published on: August 13, 2026

A metre stick of length is held vertically with one end in contact of the floor and is then allowed to fall. If the end touching the floor is now allowed to slip, the other end will hit the ground with a velocity of

A
B
C
D

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The correct answer is:
B

In this process potential energy of the metre stick will be converted into rotational kinetic energy.

P.E. of meter stick

Because its centre of gravity lies at the middle point of the rod.

Rotational kinetic energy

I = M.I. of metre stick about point

Angular speed of the rod while striking the ground Velocity of end of metre stick while striking the ground

By the law of conservation of energy,

By solving we get,

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