Question

A body starts from rest and acceleration uniformly at 5meter per seconds. Calculate the time taken by the body

Answer 1

Assume that $S=50\ m.$

$S=at^2/2$

$v=at\ \to a= v/t$

$S=vt/2 \ \to t=2S/v=2\cdot50/5=20\ (s)$ . Answer