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Question: Answered & Verified by Expert
The moon's radius is $1 / 4$ that of the earth and its mass is $1 / 80$ times that of the earth. If $g$ represents the acceleration due to gravity on the surface of the earth, that on the surface of the moon is
PhysicsGravitationJEE Main
Options:
  • A $g / 4$
  • B $g / 5$
  • C $g / 6$
  • D $g / 8$
Solution:
2956 Upvotes Verified Answer
The correct answer is: $g / 5$
Using $g=\frac{G M}{R^2}$ we get $g_m=g / 5$

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