What torque would have to be applied to a rod with a length of #7 m# and a mass of #9 kg# to change its horizontal spin by a frequency #12 Hz# over #16 s#?
The torque is the rate of change of angular momentum
The moment of inertia of a rod, rotating abour the center is
The rate of change of angular velocity is
So the torque is
The moment of inertia of a rod, rotating abour one end is
The torque is