JEE Main 2016PhysicsRotational MotionMediumMCQ

JEE Main 2016 — Rotational Motion Question with Solution

JEE Main 2016 (09 Apr Online)

Question

A cubical block of side 30 cm is moving with velocity 2 m s-1 on a smooth horizontal surface. The surface has a bump at a point O as shown in the figure. The angular velocity (in rad/s) of the block immediately after it hits the bump, is :

Choose an option

Show full solutionCorrect option: B
Correct answer
B5.0

Step-by-step explanation

Conservation of angular momentum about point O,
Lbefore=Lafter
⇒mvR=Iω
⇒ω=m×2×a2m a26+a22
⇒ω=128a=32×0.3=102=5 rad s-1

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About this question

This is a previous-year question from JEE Main 2016, covering the Rotational Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.