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The fig. shows the v-t graph of a partic...

The fig. shows the `v-t` graph of a particle moving in straight line. Find the time when particle returns to the starting point.

Text Solution

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The correct Answer is:
`36.2sec`.
For particle to return to origin. Net displacement is zero.
`0 = (1)/(2) xx 25 xx 25 +(1)/(2) xx (-4) xx (t - 25)^(2)`
`2(t -25)^(2) = 125`
`t - 25 = +- 11.2`
`t = 36.2sec.`
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