A grandfather clock that is regulated by a pendulum is taken to the Moon, where the acceleration of gravity is less. Compared to an identical clock on Earth, the grandfather clock on the Moon will
A) run fast.
B) keep time at the same rate.
C) run slow.

Question

Quizplus · Accepted Answer

The period of a pendulum is directly proportional to the square root of the length of the pendulum and inversely proportional to the square root of the acceleration due to gravity. On the Moon, the acceleration due to gravity is much less than on Earth, so the pendulum will take longer to swing back and forth. Therefore, the grandfather clock on the Moon will run slow.

A Grandfather Clock That Is Regulated by a Pendulum Is