Q. A body of $5\ kg$ is moving with a velocity of $\ 20m/s$. If a force of $100N$ is applied on it for $10s$ in the same direction as its velocity, what will now be the velocity of the body
A) $200\ m/s$
B) 220$\ m/s$
C) 240$\ m/s$
D) 260$\ m/s$
Explanation
(b) $v = u + at = u + \left( \begin{array}{r}
\frac{F}{m} \\
\
\end{array} \right)t = 20 + \left( \begin{array}{r}
\frac{100}{5} \\
\
\end{array} \right) \times 10 = 220\ m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.