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A when a diver dives, the rotational kin...

A when a diver dives, the rotational kinetic energy of diver increases, during several somersaults.
When diver pulls his limbs, the moment of inertia decreases and on account of conservation of angular momentum his angular speed increases.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `I_1 omega_1 = I_2 omega_2`
`because I_2 lt I_1`
:. `omega_2 gt omega_1`
The driver does work by pulling his limps and thus, `omega` increases or rotational kinetic energy increases.
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