The period of a pendulum is the time it takes to swing from left to right and back again.

Question

The period T seconds, of a pendulum is directly proportional to the square root of its length, Lcm.

When L=25, T=1

Find a formula for T in terms of L.

Answer 1

T = 2pi*sqrt(L/g).

T = 1 sec. = Period.
L = Length in cm.
g = 980 cm/s^2.