Question

Time-velocity graph of a particle is shown in fig. Find its instantaneous acceleration at following intervals :
(i) at t = 3s
(ii) at t = 6s
(iii) at t = 9s

Answer 1

(i) Instantaneous acceleration at t = 3s, is given by

a = slope of line AB = zero

(ii) Instantaneous acceleration at t = 6 s, is given by

a = slope of line

BC = – 10 m/ $s^2$

(iii) Instantaneous acceleration at t = 9 s, is given by

a = slope of line CD = = –50 m/$s^2$