Question

A body moves from rest with a constant acceleration of $5m/s^2$. Its instantaneous speed (in $m/s$) at the end of $10sec$ is

• A. $50$
• B. $5$
• C. $2$
• D. $0.5$

Answer 1

The correct option is A $50$

Given data,

Acceleration $a=5m/s^2$

Time $t=10m/s$

The instantaneous speed define the speed of the body is continuously speed.

$Acceleration\left(a\right)=\frac{dv}{dt}$

instantaneous speed = $a\times \Delta t$

=$5\times 10$

=$50m/s$