q

Asked by gpnkumar0 | 2nd Oct, 2017, 11:27: AM

Expert Answer:

The graph given is an acceleration-time graph. Hence, the area under the curve gives a change in velocity.
 
 
Change in velocity = area = A(Trapezium ABCD) + A(Triangle DEF) = [(3.5+2)×5]/2 + (0.5×5)/2 = 13.75 + 1.25 = 15
 
Now, change in velocity = V4 - V0 = 15
So, V4 = 15 + V0 = 15 - 2.5 = 12.5 m/s
 
Hence, the correct answer is option C.

Answered by Romal Bhansali | 25th Oct, 2017, 03:09: PM