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What is the mass of an object that creates 33,750 joules of energy by traveling at 30 meters a second?

Answer :

 power = force x velocity ==> work done/time = force x velocity ==> 33750/t = force x 30 ==> force x time = 33750/30 ==> momentum(P) = 1125 kg-m/s ( since force = momentum/time). P = m x v ==> m= P/v = 1125/30 =37.5 kg. 

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