JAMB Physics 2017 Paper

Concept:Work is done when a force causes displacement in the direction of the force.Explanation:Work done is given by: $$W = F \times d$$where $F$ is the applied force and $d$ is the distance moved in the direction of the force.If there is no displacement, no work is done.Holding a load or supporting a weight without moving it involves force but no displacement, so work is not done.When a boy climbs onto a table, he exerts a force upward against gravity and moves upward through a vertical distance.Therefore, work is done by the boy in climbing onto the table.Answer:Work is done when a boy climbs onto a table.