The kinetic energy increases by 10 J
Explanation:
For an isolated system with no frictional force acting on the system, the total mechanical energy of the system remains constant:
where
KE is the kinetic energy
PE is the potential energy
Therefore we see that the sum of kinetic energy and potential energy remains constant. This means that we can rewrite the equation as:
or
which means that the change in kinetic energy is equal to the negative of the change in potential energy.
Here, the potential energy of the object decreases by 10 J:
Therefore, the change in kinetic energy is:
So, the kinetic energy increases by 10 J.
Learn more about kinetic energy and potential energy:
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