What torque would have to be applied to a rod with a length of #6 m# and a mass of #3 kg# to change its horizontal spin by a frequency #6 Hz# over #8 s#?
1 Answer
Mar 15, 2017
The torque (for the rod rotatingabout the center) is
The torque (for the rod rotatingabout 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