Question

question 7 of 10
which statement describes the law of conservation of energy?
a. energy can change forms but cannot be created or destroyed.
b. the total energy in a system always decreases.
c. friction has no effect on the energy of a system.
d. energy can be destroyed but not created.

Explanation:

The law of conservation of energy states that energy is neither created nor destroyed. It can only change forms. Option B is incorrect as total energy doesn't always decrease. Option C is wrong because friction affects energy (converts mechanical to heat). Option D contradicts the law as energy can't be destroyed.

Answer:

A. Energy can change forms but cannot be created or destroyed.