3. A snowboarder is at the top of a snowy slope (coefficient of kinetic friction=0.115) that is inclined at an angle of

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3 A Snowboarder Is At The Top Of A Snowy Slope Coefficient Of Kinetic Friction 0 115 That Is Inclined At An Angle Of 1 (156.08 KiB) Viewed 41 times

3. A snowboarder is at the top of a snowy slope (coefficient of kinetic friction=0.115) that is inclined at an angle of 15.8° to the horizontal and is 137 m long from top to bottom. She and her snowboard have a combined mass of 47.6 kilograms. She starts from rest and goes straight down the hill. There is a flat, level portion at the bottom of the hill that she slides along for another 67.4 meters. She then goes up a second hill, which is inclined at an angle of 24.1° to the horizontal. Does this sound familiar? Use energy methods to answer all these questions. You may look at Part 1 of the Final to compare your answers to this question. a. (3 pts) Draw a diagram showing the skier's complete path. Include formulas for the Kinetic Energy and Gravitational Potential Energy at four points: At the top of the first hill, at the bottom of the first hill, at the bottom of the second hill, and when she stops at the top of the second hill. b. (4 pts) What is the skier’s velocity when she reaches the bottom of the first hill? Express your answer in m/s, and in miles/hour. c. (3 pts) What is the skier’s velocity when she reaches the bottom of the second hill? Express your answer in m/s, and in miles/hour. d. (4 pts) How many meters up the second slope does she get before she starts sliding back down?