Q 11-06-158JEE MainJEE Main 2021 (20 Jul, Shift 2)Easy
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 value type. Enter your answer.
Answer: 200
600 rpm $= 10$ rev/s and 1800 rpm $= 30$ rev/s. With uniform acceleration:
$$N = \frac{10 + 30}{2}\times10 = 200\ \text{rotations}$$
Solution by Sreeraj P, M.Sc Physics