What torque would have to be applied to a rod with a length of 3 m and a mass of 2 m to change its horizontal spin by a frequency of 3 Hz over 2 s?
1 Answer
May 13, 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 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