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An object of mass 8 kg starts to move fr...

An object of mass 8 kg starts to move from rest under the action of a variable force `F=3xN` where x is the distance (in m) covered by the object. If initially, the position of the object is x = 2 m, then find its speed `("in m s"^(-1))` when it crosses x = 10 m.

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