Question

If a force of $1000N$ is applied over a vehicle of $500kg$, then in how much time the speed of the vehicle will increase from $2m/s$ to $10m/s$?

• A. $2s$
• B. $10s$
• C. $4s$
• D. $100s$

Answer 1

Answer: (C)

$4s$

Given : $m=500$ kg $F=1000$ N $u=2$ m/s $v=10$ m/s

Acceleration of the vehicle $a=\frac{F}{m}=\frac{1000}{500}=2$ $m/s^2$

Using $v=u+at$

$\therefore$ $10=2+2t$ $⟹t=4$ s