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The acceleration-time graph of a particl...

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

8 sec

D

16 sec

Text Solution

Verified by Experts

The correct Answer is:
C
Upward area of a a-t graph gives the change in velocity `=20 m//s` for acquiring initial velocity, it again charges by same amount in negative direction.
Slope of curve`=-10//4=-2.5`

`:.` time `=sqrt((2xx20)/(2.5))=4` sec
Total time`=4+4=8` sec
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