What torque would have to be applied to a rod with a length of #5 m# and a mass of #12 kg# to change its horizontal spin by a frequency #8 Hz# over #7 s#?
1 Answer
Oct 30, 2017
The torque for the rod rotating about the center is
The torque for the rod rotating about one end is
Explanation:
The torque is the rate of change of angular momentum
The moment of inertia of a rod, rotating about the center is
The mass of the rod is
The length of the rod is
The rate of change of angular velocity is
So the torque is
The moment of inertia of a rod, rotating about one end is
So,
The torque is