Question

pendulum clocks become slow in summer because??

Answer 1

Time period of a pendulum clock is directly proportional to square root of the length of the
Pendulum.
i) In winter the length of the pendulum decreases and its time period decreases. So clock goes
fast.
ii) In summer the length of the Pendulum increases and its time period increases. So the clock
goes slow.

Answer 2

Answer:

During summer, length of the pendulum increases due to which the time period T increases and pendulum takes more time to complete one oscillation. Thus it slow in summer. During winter length decreases, decreasing the time period.