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A body of mass 1 kg starts moving from r...

A body of mass 1 kg starts moving from rest `t = 0` in a circular path of radius 8 m. Its kinetic energy varies with time as `k = 2t^(2) J` then the correct statement are:

A

Tangential acceleration `=4ms^(-2)`

B

Power of all force at t = 2 s is 8 W

C

First - round is completed in 2 s.

D

Tangential force at t = 2 s is 4 N.

Text Solution

Verified by Experts

The correct Answer is:
B
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