Physics System of Particles Rotational Motion All Topic Question for Revision Test MCQ (Single Correct)

The motor of an engine is rotating about its axis with an angular velocity of 100 rpm. It comes to rest in 15 s, after being switched OFF. Assuming constant angular deceleration, what are the numbers of revolutions made by it before coming to rest?

A
12.5
B
40
C
32.6
D
15.6

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Text Solution

Verified by Experts
The correct answer is:
A

From the equation,

Now, angle rotated before coming to rest,

Now, number of rotations,

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