Problem 2-53.
(b) Obviously the velocity is constant between t=90s to t=107s,
with v = 0 m/s.
(c) Straight line in a v-t graph indicates constant acceleration.
The curve appears to be straight in three different periods:
(d) Acceleration is given by the slope of the v-t curve. The
given curve has the greatest slope at t=70s.
(a) The greatest velocity is given by the peak of
the v-t curve, at t = 50s.
(i) t=0s to t=40s
(ii) t=65s to t=75s
(iii) t=90s to t=107s