Question

In a mechanical wristwatch, which part work in the same way as a pendulum in a clock

Answer 1

balance wheel works as a pendulum
may it will be helpful

Answer 2

HI!!
A pendulum consists of weight tied to a string. The outer end of string is tied to rigid support. The oscillations of pendulum controls the movements of the hands of clock.
In mechanical wrist watch, we have a balance wheel instead of pendulum which controls the movements of hands of clock.
HENCE, In mechanical wrist watch Balance wheel works in the same manner as pendulum in pendulum clock.

I HOPE IT WILL HELP YOU!!
Please mark it as brainliest if it helped you!