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A 28.8 g yellow air hockey disc elastically strikes a 26.9 g stationary red air hockey disc. If the velocity of the yellow disc before the collision is 33.6 cm/s in the x direction and after the collision it is 10.7 cm/s at an angle 63.4° S of E, what is the velocity of the red disc after the collision? This is an AP Physics 1 topic. Want Lecture Notes? Content Times: 0:12 The problem 1:49 Breaking the initial velocity of disc 1 into its components 3:06 Conservation of momentum in the x-direction 5:24 Conservation of momentum in the y-direction 6:26 Solving for the final velocity of disc 2 using its components 8:40 Was this an elastic collision? 12:39 Movie Character Day! Multilingual? Please help translate Flipping Physics videos! Next Video: Introduction to Circular Motion and Arc Length Previous Video: Review of Mechanical Energy and Momentum Equations and When To Use Them! Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen "Nombre de los vientos". Licensed under Public domain via Wikimedia Commons -

Name: 2D Conservation of Momentum Example using Air Hockey Discs Category: Momentum and Collisions Date Added: 2017-05-21 Submitter: Flipping Physics A 28.8 g yellow air hockey disc elastically strikes a 26.9 g stationary red air hockey disc. If the velocity of the yellow disc before the collision is 33.6 cm/s in the x direction and after the collision it is 10.7 cm/s at an angle 63.4° S of E, what is the velocity of the red disc after the collision? This is an AP Physics 1 topic. Want Lecture Notes? Content Times: 0:12 The problem 1:49 Breaking the initial velocity of disc 1 into its components 3:06 Conservation of momentum in the x-direction 5:24 Conservation of momentum in the y-direction 6:26 Solving for the final velocity of disc 2 using its components 8:40 Was this an elastic collision? 12:39 Movie Character Day! Multilingual? Please help translate Flipping Physics videos! Next Video: Introduction to Circular Motion and Arc Length Previous Video: Review of Mechanical Energy and Momentum Equations and When To Use Them! Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen "Nombre de los vientos". Licensed under Public domain via Wikimedia Commons - 2D Conservation of Momentum Example using Air Hockey Discs

It is not obvious in all relative motion problems how to draw the vector diagrams. Sometimes the velocity of the object with respect to the Earth is not the hypotenuse of the velocity vector addition triangle. Here we address how to handle a problem like that. Content Times: 0:15 Reading the problem 0:40 Translating the problem 1:52 Visualizing the problem 2:17 Drawing the vector diagram 3:33 Rearranging the vector equation 4:40 Redrawing the vector diagram 5:30 The Earth subscript drops out of the equation 5:51 Solving part (a): solving for theta 6:40 Solving part (b ): solving for the speed of the car relative to the Earth 7:48 Understanding the answer to part (b ) Want [url="http://www.flippingphysics.com/relative-motion-angle.html"]Lecture Notes[/url]? Multilingual? [url="http://www.flippingphysics.com/translate.html"]Please help translate Flipping Physics videos![/url] Next Video: [url="http://www.flippingphysics.com/inertial-mass.html"]Introduction to Inertia and Inertial Mass[/url] Previous video: [url="http://www.flippingphysics.com/relative-motion-components.html"]An introductory Relative Motion Problem with Vector Components[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url] "[url="http://commons.wikimedia.org/wiki/File:Nombre_de_los_vientos.svg#mediaviewer/File:Nombre_de_los_vientos.svg"]Nombre de los vientos[/url]". Licensed under Public domain via Wikimedia Commons

This relative motion problem addresses how to deal with vectors that do not form right triangles. Content Times: 0:15 Reading the problem 0:32 Translating the problem 1:29 Visualizing the problem 2:30 Drawing the vector diagram 2:57 Haven’t we already done this problem? 3:31 How NOT to solve the problem 4:06 How to solve the problem using component vectors 4:40 Finding component vectors 5:58 Redrawing the vector diagram 6:20 Finding the magnitude of the resultant vector 8:02 Finding the direction of the resultant vector 9:15 Showing the resultant vector angle Want [url="http://www.flippingphysics.com/relative-motion-components.html"]Lecture Notes[/url]? Multilingual? [url="http://www.flippingphysics.com/translate.html"]Please help translate Flipping Physics videos![/url] Next Video: [url="http://www.flippingphysics.com/relative-motion-angle.html"]Relative Motion Problem: Solving for the angle of the moving object[/url] Previous video: An Introductory [url="http://www.flippingphysics.com/relative-motion-problem.html"]Relative Motion Problem[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url] "[url="http://commons.wikimedia.org/wiki/File:Protractor_Rapporteur_Degrees_V3.jpg#mediaviewer/File:Protractor_Rapporteur_Degrees_V3.jpg"]Protractor Rapporteur Degrees V3[/url]" by Scientif38 - Own work. Licensed under Creative Commons Zero, Public Domain Dedication via Wikimedia Commons "[url="http://commons.wikimedia.org/wiki/File:Nombre_de_los_vientos.svg#mediaviewer/File:Nombre_de_los_vientos.svg"]Nombre de los vientos[/url]". Licensed under Public domain via Wikimedia Commons

Name: Relative Motion Problem: Solving for the angle of the moving object Category: Kinematics Date Added: 07 October 2014 - 03:02 PM Submitter: Flipping Physics Short Description: None Provided It is not obvious in all relative motion problems how to draw the vector diagrams. Sometimes the velocity of the object with respect to the Earth is not the hypotenuse of the velocity vector addition triangle. Here we address how to handle a problem like that. Content Times: 0:15 Reading the problem 0:40 Translating the problem 1:52 Visualizing the problem 2:17 Drawing the vector diagram 3:33 Rearranging the vector equation 4:40 Redrawing the vector diagram 5:30 The Earth subscript drops out of the equation 5:51 Solving part (a): solving for theta 6:40 Solving part (b ): solving for the speed of the car relative to the Earth 7:48 Understanding the answer to part (b ) Want View Video

Name: An Introductory Relative Motion Problem with Vector Components Category: Kinematics Date Added: 02 October 2014 - 09:52 AM Submitter: Flipping Physics Short Description: None Provided This relative motion problem addresses how to deal with vectors that do not form right triangles. Content Times: 0:15 Reading the problem 0:32 Translating the problem 1:29 Visualizing the problem 2:30 Drawing the vector diagram 2:57 Haven’t we already done this problem? 3:31 How NOT to solve the problem 4:06 How to solve the problem using component vectors 4:40 Finding component vectors 5:58 Redrawing the vector diagram 6:20 Finding the magnitude of the resultant vector 8:02 Finding the direction of the resultant vector 9:15 Showing the resultant vector angle Want View Video