Physics

Problem

The time period

T

of a simple pendulum is assumed to depend only on its length

l

and the acceleration due to gravity

g

. Which of the following relations is dimensionally correct? a)

T \propto \dfrac{l}{g}

T \propto \sqrt{\dfrac{l}{g}}

T \propto \sqrt{l g}

T \propto \sqrt{\dfrac{g}{l}}