Question

How much thermal energy is Generated?

Answer 1

Answer:

1000 J of thermal energy is generated.

Explanation:

The attached figure shows the whole scenario. It consists of three types of energies i.e. Gravitational Potential Energy, Kinetic Energy and thermal energy.

We know that the energy of a system remains conserved. In this case, the gravitational potential energy is the sum of kinetic energy and the thermal energy.

GPE = KE +TE

8000 J = 7000 J + TE

TE = 1000 J

So, the thermal energy is 1000 J. Hence, this is the required solution.

Answer 2

According to me, if you want to find this answer by fair means or foul then you can :P . Answer will be 1000J