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InterviewSolution
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If the body in is moving at 100 m/s on the earth’s surface, what will be its (i) kinetic energy (ii) total energy? |
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Answer» Data : m = 20 kg, u = 100 m/s . (i) The kinetic energy of the body = \(\frac{1}{2}\) mv2 = \(\frac{1}{2}\) × 20 kg × (100 m/s)2 = 105 J. (ii) The total energy of the body = kinetic energy + potential energy = 105 J + (- 1.2544 × 109 J) = (1 – 12544) × 105 J = – 12543 × 105 J = – 1.2543 × 109 J. |
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