Problem based on effective coefficient of kinetic friction
A 280 kg piano slides 4.5 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40.
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A 95g arrow is fired from a bow whose string exerts an average force of 125 on the arrow over a distance of 83cm. What is the speed of the arrow as it leaves the bow?
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