The pendulum of a clock is replaced by a spring mass system with the spring having spring constant `0.1Nm^-1`. What mass should be attached to the spring?

Answer

`=0.01kg~~10gm`

Explanation

`k=0.1N/m`
`T=2pisqrt((m/k))=2sec`
[Time period of pendulum of a clock =2 sec]
`So pi^2(m/k)=1`
`:.m=k/pi^2=0.1/10`
`=0.01kg~~10gm`