Question

A man standing on a frictionless turntable begins swinging a pendulum of 10 kg (Fig. P.9.7). The length of the pendulum is 0.5m. Swinging of the pendulum generates angular momentum in b1 direction. The man...

Problem 9.7. A man standing on a frictionless turntable begins swinging a pendulum of 10 kg (Fig. P.9.7). The length of the pendulum is 0.5 m Swinging of the pendulum generates angular momentum in bidirection The man keeps his hands fixed at the center of the body while swing- ing the pendulum. Which direction does his trunk rotate to balance the angular momentum produced by the swinging of the pendulum?

Answer 1

The trunk rotates in an anti-clockwise direction looking from the top.

This is because of the gyroscopic effect produced by the rotation of the steel ball.

As other details about the rotational velocity is not given no further calculations can be done.