Question

An artificial satellite orbiting the earth in a very thin atmosphere loses its energy gradually due to air friction. Then, why does its speed increase progressively as it comes closer and closer to the earth?

Answer 1

When an artificial satellite, orbiting around earth, moves closer to earth, its potential energy decreases because of the reduction in the height. Since the total energy of the system remains constant, the reduction in P.E. results in an increase in K.E. Hence, the velocity of the satellite increases.

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