1.

The acceleration-time graph of a particle moving along a straight line is as shown in. At what time the particle acquires its initial velocity? .A. 12 sec.B. 5 sec.C. 8sec.D. 16sec.

Answer» `a=10-(5)/(2)t`
Now dv=adt, integrating we have,
`10-(5)/(4)t^(2)=0`
`rArrt=0` or 8 sec. Accepted value 8 sec.


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