Q. For the velocity-time graph shown in figure below the distance covered by the body in last two seconds of its motion is what fraction of the total distance covered by it in all the seven seconds
A) $\frac{1}{2}$
B) $\frac{1}{4}$
C) $\frac{1}{3}$
D) $\frac{2}{3}$
Explanation
(b) $\frac{(S)_{(last\ 2s)}\ }{(S)_{7s}} = \frac{\begin{array}{r}
\frac{1}{2} \times 2 \times 10 \\
\
\end{array}}{\begin{array}{r}
\frac{1}{2} \times 2 \times 10 + 2 \times 10 + \frac{1}{2} \times 2 \times 10 \\
\ \\
\
\end{array}} = \frac{1}{4}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.