An object weighs 37.0 N on Earth. If the mass of the Moon is one eighty-first that of Earth and its radius one-fourth that of Earth, the weight of this object on the Moon would be
A) 1.77 N.
B) 7.30 N.
C) 18.2 N.
D) 28.3 N.
E) 37.0 N.

Question

Quizplus · Accepted Answer

The gravitational force is proportional to the mass of the celestial body and inversely proportional to the square of its radius. The Moon's gravity is about 1/6th of Earth's, so the weight on the Moon is 37.0 N / 6 = 6.17 N, which is closest to 7.30 N.

An Object Weighs 37