What factors affect the swing of a pendulum?

Answer 1

Air resistance, Gravity, Friction, The attachment of the pendulum to the support bar, Length of String, Initial Energy (if you just let it go it will go slower than if you swing it) and the Latitude. Amplitude only affects large swings (in small swing the amplitude is doesn't affect the swing time).

Mass of the pendulum does not affect the swing time.

A formula for predicting the swing of a pendulum: T=2(pi)SQRT(L/g)

T = time

pi = 3.14...

SQRT = square root

L = Length

g = gravity