WAEC Physics 2021 Paper

Concept:Gravitational force follows Newton’s inverse square law of gravitation.Explanation:According to Newton’s law, $F_g = G\,\frac{m_1 m_2}{d^2}$.For two fixed masses, $F_g$ is inversely proportional to the square of the distance $d$ between their centres.As $d$ increases, $F_g$ decreases rapidly and never becomes zero.The correct graph should therefore show a steeply falling curve, which matches option B.Answer:B