Question

show that when a body is dropped from a certain height than the sum of its kinetic energy and potential energy at any instant during the fall is conserved

Answer 1

Show that when a body is dropped from a certain height, the sum of its kinetic energy at any instant during its fall is constant.
Answer:The mechanical energy (kinetic energy + potential energy) of a freely falling object remains constant. It may be shown by calculation as follows:
Suppose a body of mass m falls from point A, which is at height ‘H’ from the surface of earth. Initially at point A, kinetic energy is zero and the body has only potential energy.





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Answer 2

Answer:

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