Q

Find the force exerted by Earth on the Moon if G = 6 × 10⁻¹¹ N m²/kg², Earth's mass = 6 × 10²⁴ kg, Moon's mass = 8 × 10²² kg, and their separation = 4 × 10⁸ m.

RRB ALP (Stage-I) 29/11/2024 / Shift III 2024
✓ Answer: B 1.8 × 10²⁰ N
F = GMm/r² = (6 × 10⁻¹¹ × 6 × 10²⁴ × 8 × 10²²)/(4 × 10⁸)² = 1.8 × 10²⁰ N.
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