19. The velocity of a particle moving along x-axis
varies with time as v = At2 + B, where t is in
seconds and A = 2 ms-3 and B = 5 m/s. The
magnitude of average acceleration during t = 0 to
t= 5 second is
(1) 20 m/s2
(2) 15 m/s2
(3) 10 m/s2
(4) 5 m/s2
Answers
Answered by
6
Answer:
Using the equation,
t = d/vr
We have,
3 = d/v1+v2
2.5 = d/1.5v1+v2
Solving we get,
v1 = 2d/15 and v2 = d/5
When they are going in same direction
,
,vr = v2 – v1 = d/15
Thus, t = d/vr = d/(d/15) = 15 s
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