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?

• A. 10000 J
• B. 50000 J
• C. 5000 J
• D. None of these

Answer 1

The correct option is C

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