JEE Main 2019 — Rotational Motion Question with Solution
From: JEE Main 2019 (Online) 8th April Evening Slot
Question
A rectangular solid box of length 0.3 m is held
horizontally, with one of its sides on the edge
of a platform of height 5m. When released, it
slips off the table in a very short time t = 0.01s,
remaining essentially horizontal. The angle by
which it would rotate when it hits the ground
will be (in radians) close to :-
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: D
Correct answer
D0.5
Step-by-step explanation
Angular impulse = change in angular momentum.
Time taken by rod to hit the ground
In this time angle rotate by rod
= t = 0.5 × 1 = 0.5 radian
Time taken by rod to hit the ground
In this time angle rotate by rod
= t = 0.5 × 1 = 0.5 radian
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