S081ALLab06

# S081ALLab06 - Physics 1AL Introduction ENERGY &amp; ENERGY...

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Physics 1AL Spring 2008 1 Introduction In this lab you will use conservation of mechanical energy to predict the motion of objects in situations that are difficult to analyze with force concepts. _____________________________________________________________________________ Prelab Activity Read sections 5.3, 5.4, 5.5 & 5.6 in Serway & Faughn Answer the following questions. Please, SHOW ALL YOUR WORK: 1. If a particle’s speed decreases by a factor of five, by what factor does its kinetic energy change? 2. Particle A has twice the mass and three times the kinetic energy of particle B. What is the speed ratio B A v v ? 3. A spring with spring constant k = 100 (N/m) is at its equilibrium length. a) How much elastic potential energy is stored in the spring? b) The same spring is stretched so that it is 8.0 cm longer than it was. How much elastic potential energy is stored in the spring now? c) A different spring with spring constant four times larger than in part (a) is compressed so that it is 3.0 cm shorter than its equilibrium length. How much elastic potential energy is stored in this spring? _____________________________________________________________________________ A. Group Activity The TA’s will hand out a question for you solve as a group. You should write your solution on your whiteboard and be prepared to present your solution to the class. After one group has presented their solution to the rest of the class, you should copy the correct solution into your lab notebook.

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Physics 1AL Spring 2008 2 ________________________________________________________________ B. CONSERVATION of MECHANICAL ENERGY and PROJECTILES: You have a curved ramp with the bottom at the edge of the desk and you start with a car at rest at the top. The end of the ramp is horizontal. When the car leaves the ramp, it falls to the floor on a ballistic trajectory. The horizontal distance, between the end of the ramp and where the car hits the floor, is called the range. By the end of this activity you should be able to use the concepts of gravitational potential
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## This note was uploaded on 04/09/2009 for the course PHYS 1AL taught by Professor Anderson during the Summer '08 term at UCSD.

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S081ALLab06 - Physics 1AL Introduction ENERGY &amp; ENERGY...

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