Question

The clocks or watches used to measure time based on _______.
option a) oscillatory motion
b) rectilinear motion
c) periodic motion
d) both a and b​

Answer 1

Answer:

the option is C

Clocks and watches which are used for measuring time are based on the principle of periodic motion. The pendulum clock used for measuring time is based on the periodic motion of a pendulum.

Explanation:

hope it's helpful

Answer 2

The answer will be (c) periodic motion because the clock hands i.e. hours, minutes and seconds hand repeat themselves in a fixed time. Hence they are following periodic motion.