Engineering Mechanics Practice Exam

The gravity in the Moon is about

0.6 m/s2 2.6 m/s2 3.6 m/s2 1.6 m/s2

Correct Answer:

1.6 m/s2

Explanation:

Gravity on the Moon is about 1.6 m/s^2. This value is roughly one-sixth of Earth’s gravity, since Earth’s surface gravity is about 9.8 m/s^2. The Moon’s smaller mass and size mean its surface gravity is weaker, and the standard rough figure is g ≈ 1.6 m/s^2. So the option around 1.6 m/s^2 is the best match. The other numbers are farther from the actual lunar gravity. This also explains why objects weigh about six times less on the Moon, even though their mass remains the same.

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