GCEPhysicsWork, Energy and Power2024

Which of the following statements correctly describes the work-energy theorem?

AThe work done on a body equals the change in its potential energy only.
BThe net work done on a body equals the change in its kinetic energy.CORRECT
CThe work done on a body is always equal to the force applied multiplied by time.
DThe total mechanical energy of a body is always conserved.
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Why the answer is B, and why the others tempt you.
The work-energy theorem states that the net work done on a body is equal to the change in its kinetic energy (W_net = ΔKE). Option A is incomplete as it restricts work to potential energy only. Option C describes impulse, not work. Option D describes conservation of mechanical energy, which applies only in the absence of non-conservative forces.
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