The WORK-ENERGY THEOREM states that:
ATotal mechanical energy of a system always increases over time
BKinetic energy of an isolated system is converted into heat
CNet force on a body equals product of mass and velocity squared
DNet work done on a body equals the change in its kinetic energy
Answer & Solution
Correct answer: D. Net work done on a body equals the change in its kinetic energy
Work-Energy Theorem: net work done ON an object = change in its KE. Mathematically W = KE_final − KE_initial. If net work is positive, object speeds up; if negative, slows down.
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