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A machine which is 75% efficient, use 12...

A machine which is 75% efficient, use 12 J of energy in lifting 1 kg mass through a certain height. The mass is then allowed to fall through the same height.Find the velocity at the end of its fall.

A

`sqrt(24) ms^(-1)`

B

`sqrt(32) ms^(-1)`

C

`sqrt(18) ms^(-1)`

D

`3 ms^(-1)`

Text Solution

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The correct Answer is:
C
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