Question

If an object at rest accelerates by 5 meters/sec/sec, what will be its speed after 15 seconds?

Answer 1

Given:

The initial velocity of the object is

$v_i=\text{ 0 m/s}$

The acceleration is a = 5m/s^2

The time duration is t = 15 s

To find the final velocity of the object.

Explanation:

The final velocity of the object will be

$\begin{gathered} v_f=v_i+at \\ =0+5\times15 \\ =75\text{ m/s} \end{gathered}$