Question

A car starts from rest accelerates for 10 seconds, for next 5 seconds it moves with a constant velocity. Draw a Velocity-time graph to represent its motion and use this graph to find total distance travelled by it in 15 seconds.

Answer 1

According to the question

u = 0

t1 = 10 sec
Speed  = v

T = 10 + 5 = 15 sec

Thus

V^2 -u^2 = 2ax

V^2 - 0 = 2 * a * x
Thus

x = v^2 / 2a