Graph of velocity (v) versus time 't' for motion of a motorbike which starts from rest and moves along a stright road is given .
(a)Find the average acceleration for the time interval `t_(0)`=0 to `t_(1)`=6.0 s
(b) Estimate the time at which the acceleration has its greatest positive value and the value of the acceleration at that instant.
(c) When is the acceleration is zero ?
(d) Estimate the maximum negative value of the acceleration and the time at which it occurs.

Explanation

(a)`1.3 ms^(-2),` (b) `2ms^(-2)` at 3 s, (c) at t =6s and for `t gt 10s`, (d)`-1.5ms^(-2)` at 8 s)