question_answer

When a clock controlled by a pendulum is taken from the plains to a mountain, it becomes slow but a wrist-watch controlled by a spring remains unaffected. Explain the reason for the difference in the behaviour of the two watches.

Answer:

                Due to decrease in the value of \[g\] at the mountain, the time period of the pendulum of the clock increases. On the other hand, the spring watch remains unaffected by the variation in\[g\].