JAMB Physics 2024 Paper

Concept:Work is done when a force causes displacement in the direction of the force.Explanation:Work done is given by $W = F \cdot s \cos \theta$.For work to be done, there must be both an applied force and a displacement.In Option A, the man supports a heavy load on his head: he applies an upward force, but there is no movement, so no work is done.In Option B, the woman holds a pot of water: again, no displacement occurs, so no work is done.In Option C, a boy climbs onto a table: he exerts a force upward to lift himself against gravity, and he moves upward, so there is displacement in the direction of the force.Thus, work is done in Option C.In Option D, a man pushes a stationary petrol tanker: the tanker does not move, so no displacement and no work is done.Answer:C. A boy climbs onto a table.