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P150_ExamF_F07sol

# P150_ExamF_F07sol - Physics 150 1 2 3 4 5 6 7 8 9 10 11 12...

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y 69.326 m = y y o v o sin θ ( ) t + 1 2 g t 2 := t 3.761sec = t v o sin θ ( ) g := At the top v y = 0. B) θ f 5.176 deg = θ f atan v y v x := v f 25.917 msec -1 = v f v x 2 v y 2 + := v x 25.811 msec -1 = v x v o cos θ ( ) := v y 2.338 msec -1 = v y v o sin θ ( ) g t := y 69.047 m = y y o v o sin θ ( ) t + 1 2 g t 2 := A) y o 0 m := t 4 sec := θ 55 deg := v o 45 m sec := Problem #1: Physics 150 Final Exam Solution 12/14/07
Kinetic friction on A: F kA µ k F NA := F kA 3.92 N = x-forces: F x F F AB F kA := F x m A a := F x 1.794N = F AB F F kA F x := F AB 34.286 N = Newton's Third Law: F BA F AB := F BA 34.286 N = D) For box C: F gC m C g := F gC 39.2 kgmsec -2 = y-Forces: F y F NC F gC := F y 0 := No vertical motion.

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