Q.

The figure shows the velocity (v) of a particle plotted against time (t)

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a

The particle changes its direction of motion at some point

b

The acceleration of the particle remains constant

c

The displacement of the particle is zero

d

The initial and final speeds of the particle are the same

answer is A.

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Detailed Solution

For tT, v=+ve At t=T, v=0∴ Particle changes direction of velocity at t=Ts= Net area of v-t graph =0a= Slope of v-t graph = constant
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