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Acceleration versus time graph of a part...

Acceleration versus time graph of a particle moving in a straight line is as shown in adjoining figure. If initially particle was at rest. Then corresponding kinetic energy versus time graph will be :

A

B

C

D

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The correct Answer is:
A
For constant acc. `KE = 1/2 m(u + at)^(2)` i.e. quadratic in t.
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