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At the highest point of its trajectory a vertically tossed ball has zero kinetic energy. Where has the energy gone? Has external work been done on the ball? Is the energy now in the form of potential energy in the ball? Potential energy in the Earth?

At the highest point of its trajectory a vertically tossed ball has zero kinetic energy. Where has the energy gone? Has external work been done on the ball? Is the energy now in the form of potential energy in the ball? Potential energy in the Earth?          

Grade:upto college level

1 Answers

Deepak Patra
askIITians Faculty 471 Points
8 years ago
A vertically tossed ball has zero kinetic energy at the highest point of its trajectory. The kinetic energy of the ball has not gone anywhere. It just converted to the potential energy of the ball as energy converted from one form to another. So the loss of kinetic energy of the ball will appear in the form of potential energy of the ball. Thus the energy is now in the form of potential energy in the ball but not in the Earth. To toss the ball, we give some initial velocity to the ball. Therefore external work has been done on the ball.

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