Question

A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity omega. If two objects each of mass m be attached gently to the opposite ends of a diameter of the ring, the ring will then rotate with an angular velocity

Answer 1

Answer:

We will choose clockwise as our positive direction and apply the formula

for a torque:

~τnet =

XF~

i × ~ri

τnet =

XFiri sin θi

a) About the O-axis:

τnet = −25 × 2 × sin 60 + 10 × 4 × sin 20 + 0

= −29.6 N.m

This net torque is counterclockwise

b) About the C-axis:

τnet = 0 + 10 × 2 × sin 20 − 30 × 2 × sin 45

= −35.6 N.m

This net torque is again counterclockwise

Explanation:

Hope it helps u