Answer :

Given,

Initial velocity, u = 0

Final velocity, v =?

Acceleration, a = 2 cm/s^{2}

And,

Time, t = 3 s

We know that,

v = u + *a*t

= 0 + 2 × 3

= 6 cm/s

Therefore, after 3 seconds the velocity of trolley will be 6 cm/s.

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