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Unformatted text preview: What is the tension in the cable connected to the elevator? K initial Ug initital W nc done (is it + or -)? K final Ug final K initial Ug initital Us initial W nc done (is it + or -)? K final Ug final Us final K initial Ug initital Us initial W done (is it + or -)? K final Ug final Us final A 200-kg ski cart starts against a compressed spring. When the spring is released, it launches the cart up the 30 hill so that the cart stops about 50 m from its starting position. The spring is initially compressed 10 m. Determine the force constant of the spring needed to achieve this goal. (use g = 10 m/s 2 ). Hill is frictionless. a. Fill in the Work-Energy table b. Use the table above to solve for the force constant of the spring. c. Do the same problem with the same spring, but on a surface with friction ( = 0.2). How far up the slope does the ski sled go?...
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