(a) If acceleration due to gravity is 10m/s2. What will be the potential energy of a body of
mass 1kg kept at a height of 5 Km?
(b) What is transformation of energy?
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Answer:
a) mgh×costhera= 50000×cos0
50000J
b)energy can neither be created nor be destroyed
example =your electric bulb converts electric energy into light
in gun pe is converted into ke (chemical energy is also involved , potential energy is due to gases)
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