PHYSICS—PENDULUM A simple pendulum is formed by hanging a bob of mass M on a string of len...

PHYSICS—PENDULUM A simple pendulum is formed by hanging a bob of mass M on a string of length L from a fixed support (see the figure). The time it takes the bob to swing from right to left and back again is called the period T and is given by

where g is the gravitational constant. Show that T can be written in the form