Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

What is the acceleration due to gravity on the surface of the moon if the mass of the moon is 1/80 that of Earth and its radius is one-fourth that of Earth?
Options
A 16 GMe/81Re^2
B GMe/5Re^2
Correct Answer
C GMe/Re^2
D GMe/Re
Correct Answer

Option B is the correct answer.

Detailed Explanation

g_moon = G(M_earth/80) / (R_earth/4)^2 = GM_earth/(80) * (16/R_earth^2) = (16/80) * (G M_earth/R_earth^2) = (1/5) g_earth. So g_moon = GMe/(5Re^2).

Hint

Use g = GM/R^2 and substitute given fractions.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 200 of 1250
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