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Unformatted text preview: Module 3 Show all work and reasoning in a clear, logical order for full credit. Chapter 6: 6. A person pulls a toboggan for a distance of 35.0 m along the snow with a rope directed . 25 0 above the snow. The tension on the rope is 94.0N. a) How much work is done on the toboggan by the tension force? = Work W Fcoss = . . . = . . , . W 94 0N cos25 0 35 0m 85 192935 0m 2 981 75 J b) How much work is done if the same tension is directed parallel to the snow? = . . = . . , W 94 0N cos0 35 0m 94 0N35 0m 3 290 J 17. A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam powered catapult. The thrust of its engines is . 2 3 x 105N . In being launched from rest it moves through a distance of 87 m and has a kinetic energy of . 4 5 x 107J at lift off. What is the work done on the jet by the catapult? Work provided by engine thrust ( We ): = Fs mas . = . 2 3 x 105N87m 2 00 x 107 J Work provided by catapult ( Wc ): We + Wc = KE . + 2 00 x 107 J = Wc . 4 5 x 107 J = Wc . - 4 5 x 107 J . = . 2 00 x 107 J 2 50 x 107 J 29. When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by . 2 00 x 103J . By how much does the potential energy of an 18.0 kg child increase when a child climbs a normal staircase to the second floor? Gravity potential energy (PE), man: = PE mgh . = . 81 0kg mg 2 00 x 103J = . . . mg 2 00 x 103J81 0kg 24 69 J Gravity potential energy (PE), child: = PE mgh . = . . 81 0kg mg 18 0kg2 00 x 103J = . . . . mg 18 0kg2 00 x 103J81 0kg 444 44 J 41. A 47.0 g golf ball is driven from a tee with an initial speed of 52.0 m/s and rises to a height of 24.6 m. 41....
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