A 1050 N rock sits on the edge of a cliff that is 20.4 m high. a. What is the potential energy?
b. If the rock falls, what is its kinetic energy when it strikes the ground?

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Explanation:

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answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

the body's situation won't change the forces are equal opposit and on the same body