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The velocity acquired by a body moving with uniform acceleration is 12m/s in 2 seconds and 18m/s in 4 seconds.Find the initial velocity of the body.

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it gained (18-12)=6 m/s in (4-2)=2 seconds, so that is

6/2 = 3 m/s^2

In the first 2 seconds, then, it gained 6 m/s, so it started at 6 m/s.

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