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10_15_Spring_Energy

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10/15 Spring Energy 0 Text: Chapter 6 Energy in Springs 0 HW 10/11 None today 0 Lab: “Ballistic Pendulum” 0 Presentation 0 Exam II Thursday Oct. 18 5-7 PM Wit 116 0 Practice Exam II on web and Wit 213 also a practice problem 0 Suggested problems: 6-41, 42, 43

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Your Lab v v v = 0 h Use conservation of momentum for the collision Use conservation of energy for the swing You will find the initial velocity of the ball by measuring the height. (and some math) You will also find the initial velocity of the ball by measuring its velocity with projectile motion ideas.
Tree Swing: A child’s swing made from a tire is on from a 3m rope from the limb of a tree. The mass of the child and tire combined is 60kg. The swing is released from rest at the location A. 1) Find the acceleration at all locations as the swing executes one full cycle. 2) Find the tension in the rope at locations B and C. v = 0 v = 0 A C B E D Acceleration in red Velocity in blue v D v B v C v C,D v B,C v C

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Tree Swing: A child’s swing made from a tire is on from a 3m rope from the limb of a tree. The mass of the child and tire combined is 60kg. 1) Find the acceleration at all locations as the swing executes one full cycle.
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