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Q.

Velocity-time graph is in the figure below, shows that the body has


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a

a uniform acceleration

b

a uniform retardation

c

uniform speed

d

Initial velocity OA and moving with uniform retardation 

answer is D.

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Detailed Solution

The body has the initial velocity OA and is moving with uniform retardation.
Uniform Retardation is defined as retardation, which has negative acceleration, and it is called uniform if the equal amount of velocity decreases or increases with time.
From the given graph, we can see that at t=0, the velocity of the particle is OA, i.e. the particle has some initial velocity, and as time increases, the velocity decreases simultaneously.
 
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