(Answered) A 12-pack of omni-cola mass 430 kg is initially at rest on

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A 12-pack of Omni-Cola (mass 4.30 kg) is initially at rest on a horizontal floor. It is then pushed in a straight line for 1.20 m by a trained dog that exerts a horizontal force with magnitude 36.0 N. Use the work-energy' theorem to find the final speed of the 12-pack if

(a) There is no friction between the 12-pack and the floor, and

(b) The coefficient of kinetic friction between the l2-pack and the floor is 0.30.

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