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Q.

The acceleration - time graph of a particle moving in a straight line is shown in the fig. The velocity of the particle at time t=0 is 2ms-1. The velocity after 2 seconds will be

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a

4ms-1

b

6ms-1

c

2ms-1

d

8ms-1

answer is B.

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Detailed Solution

Vf - Vi =  [Area under the graph] = 1224=4Vf = 2+4 = 6m/s
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The acceleration - time graph of a particle moving in a straight line is shown in the fig. The velocity of the particle at time t=0 is 2ms-1. The velocity after 2 seconds will be