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If a trolley starts from rest with an acceleration of $2 m / s^{2}$ , the velocity of the body after $4 s$ would be

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2 m / s

4 m / s

8 m / s

6 m / s

answer is C.

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Detailed Solution

If a trolley starts from rest with an acceleration of

2 m / s^{2}

, the velocity of the body after 4 s would be

8 m / s

.
We know that,

v = u + at

Here,

u = 0

, as the body starts moving from rest

{a = 2 m / s}^{2}

Then

v = 0 + 2 \times 4

.
Therefore,

v = 8 m / s

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