PHYS 1300 Lecture Notes - Lecture 15: Friction, Lichen, Iceberg
2 Nov 2017
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Momentum, conservation of momentum, momentum in collisions. Conservation of energy example: a girl swings back and forth on a playground swing. The lowest point is 0. 500 m above the ground. What is the maximum speed of the girl on the swing and at which point in her path does it occur. Since ep is at its lowest when she is at her lowest point, so she has a max. Ep1 + ek1 = ep2 + ek2 mgy1 + mv12 = mgy2 + mv22 (9. 8 m/s2)(2. 00 m) + (0)2 = (9. 8 m/s2)(0. 500 m) + mv22. 19. 6 = 4. 9 + v22 v2 = 5. 42 m/s point. Ep1 + ek1 mgy1 + mv2 y1 = 2. 00 m v1 = 0 m/s. Which of the slides should she choose: a, b, c, d, it doesn"t matter her speed will be the same for each slide, use energy methods to solve the following problem.
