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JEE Main 2021 (20 Jul, Shift 2) · Rotational Kinematics & Dynamics

Rotational Kinematics & Dynamics question from JEE Main 2021 (20 Jul, Shift 2)

Q37JEE Main 2021 · 20 JUL · SHIFT 2Easy

Rotational Kinematics & Dynamics

A body rotating with an angular speed of 600 rpm is uniformly accelerated to 1800 rpm in 10 sec. The number of rotations made in the process is ___________.

Numerical answer type. Work it out, then open the answer.

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Answer: 200

600 rpm $= 10$ rev/s, 1800 rpm $= 30$ rev/s
Rotations $= \frac{10 + 30}{2} \times 10 = 200$
So the number of rotations is 200.

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