Question

An engine supplies 196 joule of energy. If the energy is supplied to a weight of 500 gram, how high can it be
lifted? (Given g = 10 m s-2).
If 196 102 J of energy were used to raise a 20 kg boy above the ground, how high would he be raised ?
When
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2​

Answer 1

answer : Energy supplied to the engine = 196 JMass of water = 500 gm = 500/1000 = ½ kg2Acceleration due to ground (g) = 10 mt/sec .Energy required for lifting water = mghH = energy supplied / m x g = 196 x 2 / 1 x 10 = 39.2 mt.