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प्रश्न
A block of iron of mass 400 kg is used as a pile driver. If it is raised to a height of 20 meters, calculate the potential energy possessed by the iron block. (Assume g= 10 ms-2).
संख्यात्मक
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उत्तर
Given, mass m = 400 kg, height = 20 m, g = 10ms-2
P.E = mgh = (400) (10) (20) = 80000 J
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