Question

A wheel having moment of inertia 2 kg–m2 about its vertical axis, rotates at the rate of 60 rpm about the axis. The torque which can stop the wheel's rotation in one minute would be

• A. $\frac{\pi}{12}$ N-m
• B. $\frac{\pi}{15}$ N-m
• C. $\frac{\pi}{18}$N-m
• D. $\frac{2\pi}{15}$ N-m

Answer 1

Answer: (B)

$\frac{\pi}{15}$ N-m

Answer 2

The torque required to stop the wheel's rotation in one minute is approximately $\frac{\pi}{15}$ N-m