Rotation 2 Question 7
7. A child is standing with folded hands at the centre of a platform rotating about its central axis. The kinetic energy of the system is
(a)
(b)
(c)
(d)
(2004)
Show Answer
Answer:
Correct Answer: 7. (b)
Solution:
- From conservation of angular momentum (
The rotational kinetic energy will become half.
