The motion of a simple pendulum is very close to Simple Harmonic Motion (SHM).
SHM results whenever a restoring force is proportional to the displacement, a relationship often known as Hooke’s Law when applied to springs. Where F is the restoring force, k is the spring constant, and x is the displacement.
Find out how the period of oscillation varies in a pendulum – does it depend on the length of the pendulum or the mass of the bob? Will it swing faster or slower when transferred to Moon?
All of us know that we need a pump to take water...