Question

A graph of acceleration versus time of a particle starting
from rest at t = 0 is as shown in Fig. The speed of the particle
at t = 14 second is
(a) 2 ms⁻¹ (b) 34 ms⁻¹
(c) 20 ms⁻¹ (d) 42 ms⁻¹

Answer 1

Answer:

I thought d option is the correct answer

Answer 2

Answer:

Area under a−t graph is change in velocity

Area=

2

1

(4×4)+6×4+

2

1

×2×4−

2

1

×2×2

=36−2

=34m/s

As initial velocity is zero therefore, the velocity at 14 second is 34m/s