Calculate the force of attraction between two bodies, each of mass 100 kg and 1 m apart on the surface of the Earth. Will the force of attraction be different if the same bodies are taken on the Moon, their separation remaining constant.
We know that the gravitational force is given by:
F = G (Mm / r²)
Here, M = m = 100 kg, r = 1 m, and G = 6.67 × 10⁻¹¹ N·m²·kg⁻²
∴ F = (6.67 × 10⁻¹¹ × 100 × 100) / (1)²
Force of attraction = 6.67 × 10⁻⁷ N