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Question

A satellite becomes unstable in its orbit and begins to fall towards earth and simultaneously starts burning. If the satellite had a potential energy of 10000 J initially and by the time it reaches the surface of the earth it attains a kinetic energy of 5000 J, then how much energy was lost as a result of its burning?
  1. 5000 J
  2. 10000 J
  3. 50000 J
  4. None of these


Solution

The correct option is A 5000 J
Potential energy is converted to kinetic energy and heat energy.
So 10000 J = 5000 J + heat energy
Therefore, heat energy = 10000 - 5000 = 5000 J

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