A satellite gets unstable in its orbit and starts to fall towards earth and also starts burning. If the satellite had a potential energy of 1000 joules initially and by the time it reaches the surface of the earth it attains a kinetic energy of 500 joules then how much energy is spent in heating the satellite?
500J
Potential energy is converted to kinetic and heat.
So, 1000 = 500 + Heat energy
Heat energy = 500 J