Collisions Physics Classroom Key 2020

http://www.physicsclassroom.com From The Physics Classroom’s Physics Interactives Ye-iy &03O Elastic Collisions Purpose: To gather evidence that can be used to support a claim that total system momentum is or is not conserved in an elastic collision . Background : The objects involved in a collision are often considered as a system. Provided that the system of two objects is not experiencing a net external impulse, there would be no change in momentum of the s> stem . If one object within the system loses momentum, it is gained by the other object within the system . The combined momentum of both objects would be conserved . Getting Ready: Navigate to the Collision Carts Interactive in the Physics Interactives section of The Physics Classroom website : http:// www. phy sicsclassroom .com / Phy sics- Interactives/ Momentum -and -Collisions/Collision -Carts Path: physicsclassroom. com => Physics Interactives => Momentum and Collisions => Collision Carts Once the Interactive opens, resize it as desired. Select the Elastic Collisions option. Experiment with changing the Mass and the Initial Velocity of the two carts. Observe how the position of the carts along the track can be changed by dragging. Learn to Start, Pause, and Reset the animation. Collision 1: Blue Cart Initially at Rest Set the initial blue cart velocity to 0 m /s. Set the mass values to different values. Run the simulation and record the mass and velocity values. After Collision Be fore Collision Vred = 5 0 m /s " Vred "* 0 Hiked e . = m /s V blue « o' 0: _ ± 1.1 kg tc .1 m /s '0 e " kg ni|!lue - Use mass and veloc ty values to complete the following momentum table. 9, Red Cart kg x \0 kg x Blue Cart 5 m /s r\ OL kg*m/s Q a AMomentum After Collision Before Collision m/s kg* m /s kg x 3.4: Ll m/s kg* m /s kg x (nTl IM System Total 1,1 m /s kg* m /s P* Pi ‘ 3.4 -I D PrPi - bU O ^ (pj *P o oXl /VyoS- f , . ©The Physics Classroo n , All Rights Reserved This document should NOT appear on other websites. http://www.physicsclassroom.com From The Physics Classroom’s Physics Interactives Collision 2: Blue Cart Moving Slower than the Red Cart Set the initial blue cart velocity to less than the red cart velocity . Position the blue cart near the red cart so that the collision occurs near the middle of the track . Give the blue cart a smaller mass. Run the simulation and record the post-collision mass and velocity values. Before Collision ^ red n 5 0 m /s 2 ^ blue 0 After Collision m /s Vred 3 = m /s m /s V|) iue 0 0 rr jJ. ITlRed \ mmuc - kg “ kg Use mass and velocity values to complete the following momentum table. Before Collision a Red Cart *5 10 1 Blue Cart kg x kg x St- After Collision 2 m /s (o kg » m /s b kg x < m/s m /s kg* m /s kg x ic kg*m /s 3 AMomentum jo - b 10 - H m/s kg m /s » lo ~ oL = 4 System Total Conclusion Make a Claim as to whether momentum is conserved or not conserved. Identity the Evidence that supports your claim; refer to specific sets of values in each data table. Write a paragraph or more of sound Reasoning to argue why the evidence logically lead to the claim you are making. Write well . Write logically. Write thoroughly . Use a separate page of paper if necessary . Conserved. / Ri AP I ©The Physics Classroom, All Rights Reserved P!\ - Q ! O This document should NOT ap 3ear on other websites. From The Physics Classroom ’s Physics Interactives http://www .physicsclassroom .com D ^c)0 ~ Inelastic Collisions Purpose: To gather evidence that can be used to support a claim that total system momentum is or is not conserved in an inelastic collision . Background : The objects involved in a collision are often considered as a system. Provided that the system of two objec :s is not experiencing a net external impulse, there would be no change in momentum of the s> stem. If one object within the system loses momentum , it is gained by the other object within the sys tem. The combined momentum of both objects would be conserved. Getting Ready: Navigate to the Collision Carts Interactive in the Physics Interactives section of The Physics Classroom website: http://www.physicsclassroom.com /Physics-Interactives/Momentum -and-Collisions/Collision-Carts Path: physicsclassroom.:om => Physics Interactives => Momentum and Collisions => Collision Carts Once the Interactive opens, resize it as desired. Select the Inelastic Collisions option. Experiment with changing the Mass and the Initial Velocity of the two carts. Observe how the position of the carts along the track can be changed by dragging. Learn to Start , Pause, and Reset the animation . Collision 1 : Blue Cart Initially at Rest Set the initial blue cart velocity to Ojn /s. Set the mass values to different values. Run the simulation and record the mass and velocity values. Before Collision 5 v= n 0 After Collision m /s 0 * niRed — a 0 A mm ,. e ~ kg Use mass and veloc ty values to complete the following momentum table. Before Collision ^ lO kg x Red Cart kg x Blue Cart System Total 5 After Collision m /s kg» m/s Q o (O ©The Physics Classrooih, All Rights Reserved m /s kg*m/s kg x tab kg x a. a . 3 AMomentum m /s kg» m/s 3' 3 m/s kg*m/s 3 3-0 3.3 * -. 1 This document should NOT appear on other websites . / http://www.physicsclassroom.coin From The Physics Classroom’s Physics Intcractivcs Collision 2: Blue Cart Moving Slower than the Red Cart Set the initial blue cart velocity to less than the red cart velocity . Position the blue cart in the middle of the track . Use different mass values. Run the simulation and record the mass and velocity values. Before Collision V" 5 © A v= m /s i0 © After Collision V = m /s m /s e e 0 fl mud — A m nine kg m fl kg Use mass and velocity values to complete the following momentum table. After Collision Before Collision kg x Red Cart Io I Blue Cart System Total f) kg x m /s S, ft kg*m/s ol £ m /s kg* m /s IX kg x I ^ ^ AMomentum m /s 6 r 10 kg*m /s kg x 4 \ m /s kg*m /s x - 4 3 QL o Conclusion Make a Claim as to whether momentum is conserved or not conserved. Identify the Evidence that provides support for your claim ; refer to specific sets of values in each data table that serve as credible evidence. Write a paragraph or more of sound Reasoning to argue why the evidence logically lead to the claim you are making. Write well . Write logically. Write thoroughly . Use a separate page of paper if necessary . ( on &rvfdli fg Ap -0 © The Physics Classroom , All Rights Reserved This document should NOT appear on other websites.