A spring balance has a scale that reads from 0 to 50 kg. The length of the scale is 20 cm. A body suspended from this balance, when displaced and released, oscillates with a period of 0.6 s. What is the weight of the body?

Explanation

Spring constant `=(50kg)/(0.2 m)="250 kgm"^(-1)`
We know that `T=2pisqrt((m)/(k)), T=0.6s" (given)"`
`"i.e. "m=(kT^(2))/(4pi^(2))=(250xx(0.6)^(2))/(4xx(3.142)^(2))`
`m=2.279kg`.
Mass of the body `=2.279 kg` and its weight is 2.279 kg wt.