A particle starts motion from rest and moves along a straight line. Its acceleration-time graph is shown. Find out speed of particle at t=2s and at t=3s.

Explanation

Velocity =area under a-t curve
at `t=2s, v=1xx1+(1)/(2)xx1xx=1.5 ms^(-1)`, at `t=3s, v=1.5-(1)/(2)xx1xx1=1 ms^(-1)`