A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?
A) the one on the moon
B) the one on Earth
C) They have the same mass.
D) not enough information to say

Question

Quizplus · Accepted Answer

The gravitational force on the moon is weaker than on Earth. For a rock to weigh the same on the moon as on Earth, it must have a greater mass, since weight is the product of mass and the gravitational acceleration.

A Rock Weighs 30 N on Earth