Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Gravitation/
Question 30730
JEE Physics · Medium

Gravitation: Escape Velocity — Moon MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Escape Velocity — MoonMediumQuestion 30730

Question

Moon's escape velocity is about 2.38 km/s (vs Earth's 11.2 km/s). This is primarily because Moon has:
  1. A
    Smaller radius only
  2. B
    Less mass → weaker gravity
  3. C
    Both smaller mass and smaller radius leading to lower surface g
    Correct
  4. D
    Higher density

Correct answer

Both smaller mass and smaller radius leading to lower surface g

Explanation

v_e = √(2gR). Moon's g ≈ 1.62 m/s² (vs 9.8), and R_moon = 1740 km (vs 6371 km). Combined effect gives v_e = √(2×1.62×1.74×10⁶) ≈ 2.38 km/s.

Review Gravitation notesStart timed chapter practice