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The displacement of a particel moving w...

The displacement of a particel moving with uniform acceleration after r's given by s = `10 t + 4.9 t ^2` ? What is the magnitude the final velocity at t = 3 s and the uniform acceleration .

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Displacement = `s = 10 t + 4.9 t^(2) `. Velocity `= v = (ds)/(dt)`
(i) `v = (ds)/(dt) = 10 + 2 xx 4.9 t ` when t = 3s , v = `10 + 9.8 xx 3 = 39.4 ` m/s
(ii) ` a = (dv)/(dt) = 0 + 9.8 = 9.8ms^(-2)`
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