a pebble is thrown up. it goes to a height and then comes back in the ground. state the different changes in form of energy during its motion
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At the starting point of it's journey if u consider the pebble being thrown from ground level then it's only has kinetic energy. With time as it moves vertically to reach the highest point of it's energy kinetic energy reduces and potential energy increases.
At the highest point it has only potential energy.
The potential energy is equal to kinetic energy at it's lowest point.
While it's coming down potential energy reduces while kinetic energy increases.
At the end of it's journey it only has kinetic energy. THIS IS THE CASE ONLY IF IT IS THROWN FROM GROUND LEVEL.
IF THROWN FROM A CERTAIN HEIGHT INITIALLY THEN IT WOULD HAVE HAD KINETIC ENERGY AS WELL AS SOME POTENTIAL ENERGY AT THE BEGINNING ITSELF
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