Physics
Mechanics
Easy
Question
A man of mass 100 kg stands at the rim of a turn table of radius 2m, moment of inertia 4000 kg. The table is mounted on a vertical smooth axis, through its center. The whole system is initially at rest. The man now walks on table with a velocity 1 m/s relative to earth
With what angular velocity will the turn table rotate
- 0.5 rad/sec
- 0.1 rad/sec
- 0.05 rad/sec
- 0.2 rad/sec
The correct answer is: 0.05 rad/sec
By conservation of angular momentum on the man table system,
Thus the table rotates clockwise (opposite to man) with angular velocity 0.05 rad/s.
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