Q. 14.8 A spring balance has a scale that reads from $0$ to $\inline 50\; kg.$ The length of the scale is $\inline 20 cm,$ A body suspended from this balance, when displaced and released, oscillates with a period of $\inline 0.6\; s.$ What is the weight of the body?

$\\k=\frac{Weight\ of\ Maximum\ mass\ the\ scale\ can\ read}{Maximum\ displacement\ of\ the\ scale}\\ k=\frac{50\times 9.8}{20\times 10^{-2}}\\ k=2450\ Nm^{-1}$
$\\T=2\pi \sqrt{\frac{m}{k}}\\ m=\frac{T^{2}k}{4\pi ^{2}}\\ m=\frac{(0.6)^{2}\times 2450}{4\pi ^{2}}\\ m=22.34\ kg\\ w=mg\\ w=22.34\times 9.8\\ w=218.95\ N$