You have a light spring, a metre scale and a known mass. How will you find the time period of oscillation of mass without the use of a clock ?

Explanation

Suspended the known mass from one end of spring whose another end is connected to a rigid ceiling. Note the extension l in the spring with the help of metre scale. If k is the spring constant of the spring, then in equlibrium position,
`kl=mg or (m)/(k)=(l)/(g)`
Tiem period of the loaded spring,
`T=2pisqrt((m)/(k))=2pisqrt((l)/(g))`
Knowling, the value of l, time period of oscillation T can be determined.