A system loses 510 J of potential energy. In the process, it does 430 J of work on the environment and the thermal energy increases by 100 J. Required:
Find the change in kinetic energy.

20J

Explanation:

The computation of the change in kinetic energy is shown below:

As we know that

Work was done on system =  change in potential energy + change in kinetic energy + change in thermal energy

-430J = -510J + change in kinetic energy + 100J

-430J = -410J + change in kinetic energy

So, the change in kinetic energy is 20J

We simply applied the above formula to find out the change in kinetic energy

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