An object of Mass 40 kg is raised to a height of 5m above the ground w – InterviewSolution

1.	An object of Mass 40 kg is raised to a height of 5m above the ground what is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half way down.
Answer» Mass m = 40 kg. height h = 5 m. Potential energy PE = mgh = 40 × 9.8 × 5 = 1960J. KE at half way down = PE at halfway down = \(mg\frac{h}{2}\) = 40 × 9.8 × \(\frac{5}{2}\) = 980 J.

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