Q.

The velocity-time graph AB shows that the body has


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a

Uniform acceleration

b

Uniform retardation

c

Uniform velocity throughout its motion and has zero initial velocity

d

None of these 

answer is D.

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Detailed Solution

The velocity-time graph AB shows that the body does not have uniform acceleration, uniform retardation and uniform velocity throughout its motion and has zero initial velocity.
As we know that acceleration is the rate of change of velocity with respect to time. i.e.
a=v-ut
Where, a= acceleration, v=final velocity, u= initial velocity and t= time
By the given graph, as t changes, velocity remains the same, i.e. v= u
So, a=v-ut
          =0t
          =0
This means by the given graph; the particle has zero acceleration.   
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