Question

If a body starts from rest and attains the velocity 40 m/s in 5 seconds, then the acceleration of the body is

• A. 2 $m/s^2$
• B. 4 $m/s^2$
• C. 8 $m/s^2$
• D. 12 $m/s^2$

Answer 1

The correct option is C 8 $m/s^2$

Give, initial velocity (u) = 0, final velocity (v) = 40 m/s and time (t) = 5 sec
As we know, v = u + at
$40=0+a\times 5$
or, $a=\frac{40}{5}=8m/s^2$