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The kinetic energy of a body is 'K'. If ...

The kinetic energy of a body is `'K'`. If one-fourth of its mass is removed and velocity is doubled, its new kinetic energy is

A

`K`

B

`3K`

C

`4K`

D

`9K//4`

Text Solution

Verified by Experts

The correct Answer is:
B
`KE = (1)/(2)m v^(2)` , `KE' = (1)/(2)m' (v')^(2)`
`m' = (3m)/(4), v' = 2v`
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