Question

A flywheel has a moment of inertia 2 kg m^2. What torque is required to increase its velocity from 4 rad/s to 16 rad/s in 4 s?

Answer 1

torque=moment of inertia*angular acceleration

angular acceleration=angular speed/time

30/15 = 2

moment of inertia=2

so,torque =4Nm