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प्रश्न
Find the gravitational potential energy of 1 kg mass kept at a height of 5 m above the ground. Calculate its kinetic energy when it falls and hits the ground. Take g = 10 m s-2.
संख्यात्मक
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उत्तर
Mass, m = 1 kg
Height, h = 5m
Gravitational potential energy = Force × height
= mgh = 1 × 10 × 5 = 50J
When the mass hits the ground, its entire Potential energy is converted to Kinetic energy.
Hence, the Kinetic energy of mass on hitting the ground = 50 J.
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