Categories > Work, Energy and Power > WEP > A machine which is 75 percent efficient, uses 12 joules of energy in lifting up a 1 kg mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in $m{s^{ - 1}})$

Work, Energy and Power

Question: A machine which is 75 percent efficient, uses 12 joules of energy in lifting up a 1 kg mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is (in $m{s^{ - 1}})$


1) $\sqrt {24}$
2) $\sqrt {32}$
3) $\sqrt {18}$
4) $\sqrt 9$
Solution: Explanation: No Explanation
WEP Conservation of Energy and Momentum

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