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On increasing the speed of a bosy to 2ms...

On increasing the speed of a bosy to `2ms^(-1)`, its kinetic energy is quadrupled. Then is original speed must be

A

`0.25 ms^(-1)`

B

`1 ms^(-1)`

C

`4 ms^(-1)`

D

`2 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K = (1)/(2)Mv^(2)` and `4K = (1)/(2)M(v+2)^(2)`
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