Question

the height of Qutub Minar is 72m. calculate the potential energy of stone of mass 5 kg, placed at the top of the m minor . Where g=9.8 m/sec
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Answer 1

mass= 400g= 0.4kg

height=72m

Gravitaional acceleration= 10m/s2

Potential energy= mgh= 0.4 x 10 x 72= 4 x 72= 288j approx.