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Q. The coefficient of kinetic friction for a 25 bobsled on a track is 0.10. What force is required to push it down a 5.0 incline and achieve a speed of 64 at the end of 75?

Q. A car with a mass of 1050 kg crashes into a wall. the car's velocity immidately before collision was 14ms and the bumper is compressed like a spring constant 1.14 N/m. what is the maximum deformation of the bumper for this collision?

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