Question

A stone of mass 4 kg is tied to string of length 10 m rotates in horizontal circle , if the tension force in the string is 160 N, what is the stone speed ????????????????

Answer 1

$\huge\ \pmb{\green{«\: คꈤ \mathfrak Sฬєя \: » }} \\ \sf{m=4kg} \\ \\ \sf{r=10m} \\ \\ \sf{υ=?} \\ \\ \sf{T=F=160N} \\ \\ \sf \red{T=F = \frac{μυ {}^{2} }{r}} \\ \\ \sf{υ= \frac{ \sqrt{F \times r} }{m} }\\ \\ \sf{=20m/s} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \huge\sf{WildCat7083}$