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A skier is gliding along at 4.4 m/s on horizontal, frictionless snow. He suddenly starts down a 10 incline. His speed at the bottom is

A skier is gliding along at 4.4 m/s on horizontal, frictionless snow. He suddenly starts down a 10∘ incline. His speed at the bottom is 12 m/s and How long does it take him to reach the bottom?

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