Mountain highways with long descents have “escape” roads with  a steep incline for vehicles to take if their brakes have failed. If one of these roads is inclined at 49 degrees above horizontal, how long must it be to stop a truck weighing 20,000 lb that is traveling at 64 mph? Provide your answer in ft and round to the nearest whole number.

Q: The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650 N.…

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Q: F_ m m μsk y x

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Q: direction

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Q: y ca cosh

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!