Question

If a trolley starts from rest with an acceleration of 2 $m/s^2$, the velocity of the body after 4 s would be

• A. 2 m/s
• B. 8 m/s
• C. 4 m/s
• D. 6 m/s

Answer 1

Answer: (B)

8 m/s

Given:

initial velocity $u=0$ (Since the body is starting from rest)

acceleration $a=2m/s^2$

time taken $t=4s$

final velocity $v=?$

According to the first equation of motion $v=u+at$

$v=0+2\times 4=8m/s$