JEE Main 2016 — Rotational Motion Question with Solution
From: JEE Main 2016 (Online) 9th April Morning Slot
Question
A cubical block of side 30 cm is moving with velocity 2 ms−1 on a smooth horizontal surface. The surface has a bump at a point O as shown in figure. The angular
velocity (in rad/s) of the block immediately after it hits the bump, is :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
A5.0
Step-by-step explanation
Before hitting point 0,
angular moment = mv
After hitting point 0,
Angular momentum =
=
=
= moment of inertia about edge,
=
=
=
= = = = 5 rad/s
angular moment = mv
After hitting point 0,
Angular momentum =
=
=
= moment of inertia about edge,
=
=
=
= = = = 5 rad/s
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