General Physics 151 Week 7 Notes
General Physics 151 Week 7 Notes PBH205
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This 2 page Class Notes was uploaded by Lindsey Notetaker on Thursday October 13, 2016. The Class Notes belongs to PBH205 at University of Nevada - Las Vegas taught by Dr. Jin in Fall 2016. Since its upload, it has received 4 views. For similar materials see Introduction to Public Health in Public Health at University of Nevada - Las Vegas.
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Date Created: 10/13/16
General Physics 151 Week 7 Notes (October 10, 2016) Chapter 6: Momentum and Collision Key to my notes: All notes that are taken from the lecture will be the first section, notes I take from the textbook will be the second section, and the vocabulary words from the chapter with definitions will be the last sections! For this one it goes from 6.4 to end of chapter 6 (: Lecture Notes Change in power = 0 for any collision event then: o (mass 1 X final velocity 1) + (mass 2 X final velocity 2)= (mass 1 X initial velocity 1) + (mass 2 X initial velocity 2) This goes for any dimension so in the x, y , or z direction Elastic collision is final kinetic energy= initial kinetic energy Inelastic collision is when final kinetic energy does not equal initial kinetic energy Completely inelastic collision is when velocity 1 = velocity 2 Negative kinetic energy means that it’s the amount of energy that is lost Center of mass is the mass distribution of a system o To find the radius of the center of mass it is found by (adding the mass of object ? X radius of object ?)/ (masses added together) o To find the velocity of the center of mass it is found by (change in radius of the center of mass)/change in time Can also be the power/mass o To find the acceleration of the center of mass it is found by (change in velocity of the center of mass)/change in time o To find the total external force it can be found by the change in power/change in time Can also be found mass X acceleration of the center of mass Textbook Notes If the collision occurs in higher dimensions then break the velocities into the components of the dimensions that are involved If there are many points involved then you add all the impulses and find the total external impulse Center of mass radius can be found by adding each mass X it’s corresponding radius and dividing that by the addition of all the masses Center of mass velocity can be found by finding the change in the center of mass radius by dividing the change in time Page 1 of 2 General Physics 151 Week 7 Notes (October 10, 2016) Center of mass acceleration can be found by finding the change in the mass velocity by dividing the change in time Reduced mass can be found by the coefficient X acceleration o Coefficient = (mass 1 X mass 2)/(mass 1 + mass 2) Vocabulary Words Reduced Mass: a quantity which allows the twobody problem to be solved as if it were a onebody problem Page 2 of 2
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