A body of mass 5kg falls from a height of 100m.how much energy does it posses after 2 seconds from start?
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Answer:
The energy possessed by body = 4.9 kJ
Explanation:
Initial P.E = mgh = 5 x 9.8 x 100 = 4900 J = 4.9 kJ
Initial K.E = 0
Total energy = P.E + K.E = 4.9 kJ
The total energy remains same.
∴ The energy possessed by body after 2 s = 4.9 kJ
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