Question

How much thermal energy is Generated?

Gravitational Potential Energy 8000 J
Kinetic Energy 7000 J
Thermal Energy ? J

Answers
1000 J
2000 J
7000 J
15,000 J

Answer 1

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

Answer 2

1000 J of thermal energy is generated.

Step-by-step 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.