D. An increase of 4000 J
What is law of conservation of energy?
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to .
However, though energy can be transformed, it cannot be created or destroyed.
That is, the total amount of energy in a system never changes. This forms the basis of the law of conservation of energy, one of the most important principles in science.
i.e. KE + PE = constant.
As per the question,
Total change in energy = K.E. + P.E.
= 1500J + 2500J
= 4000 J
Therefore,
4000 J is the total change in energy.
Learn more about Law of conservation of energy here:
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