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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 xdirection 5:24 Conservation of momentum in the ydirection 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 
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 kinetic energy
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Name: 2D Conservation of Momentum Example using Air Hockey Discs Category: Momentum and Collisions Date Added: 20170521 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 xdirection 5:24 Conservation of momentum in the ydirection 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

 kinetic energy
 elastic

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A racquetball is dropped on to three different substances from the same height above each: water, soil, and wood. Rank the _______ during the collision with each substance in order from least to most. (a) Impulse. (b) Average Force of Impact. (Assume the racquetball stops during the collision with the water and soil.) This is an AP Physics 1 Topic. Want Lecture Notes? Content Times: 0:11 Prom Dress Day! 0:20 The three demonstrations 0:32 The problem 1:43 The equation for Impulse and Impact Force 2:02 Understanding the two parts to the demonstrations 3:33 Part (a): Impulse [water and soil] 4:47 Part (a): Impulse [wood] 5:23 Part (b): Impact Force [water and soil] 6:27 Part (b): Impact Force [wood] 7:59 The Ann Arbor Prom Dress Project Thank you to Jan Wery and Judi Lintott of the Ann Arbor Prom Dress Project: “Find your dream dress for less than $25." Next Video: Review of Mechanical Energy and Momentum Equations and When To Use Them! Multilingual? Please help translate Flipping Physics videos! Previous Video: Using Impulse to Calculate Initial Height Please support me on Patreon! Thank you to my Quality Control help: Scott Carter and Jennifer Larsen

Name: Impulse Comparison of Three Different Demonstrations Category: Momentum and Collisions Date Added: 20170209 Submitter: Flipping Physics A racquetball is dropped on to three different substances from the same height above each: water, soil, and wood. Rank the _______ during the collision with each substance in order from least to most. (a) Impulse. (b) Average Force of Impact. (Assume the racquetball stops during the collision with the water and soil.) This is an AP Physics 1 Topic. Want Lecture Notes? Content Times: 0:11 Prom Dress Day! 0:20 The three demonstrations 0:32 The problem 1:43 The equation for Impulse and Impact Force 2:02 Understanding the two parts to the demonstrations 3:33 Part (a): Impulse [water and soil] 4:47 Part (a): Impulse [wood] 5:23 Part (b): Impact Force [water and soil] 6:27 Part (b): Impact Force [wood] 7:59 The Ann Arbor Prom Dress Project Thank you to Jan Wery and Judi Lintott of the Ann Arbor Prom Dress Project: “Find your dream dress for less than $25." Next Video: Review of Mechanical Energy and Momentum Equations and When To Use Them! Multilingual? Please help translate Flipping Physics videos! Previous Video: Using Impulse to Calculate Initial Height Please support me on Patreon! Thank you to my Quality Control help: Scott Carter and Jennifer Larsen Impulse Comparison of Three Different Demonstrations

An important review highlighting differences between the equations for Conservation of Momentum, Impact Force and Impulse. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:17 Conservation of Momentum 1:01 An explosion is a collision in reverse 1:22 Impact Force 1:39 Impulse 2:16 Impulse equals 3 things 2:53 How many objects are in these equations? A big THANK YOU to Elle Konrad who let me borrow several of her old dance costumes! Next Video: Using Impulse to Calculate Initial Height Multilingual? Please help translate Flipping Physics videos! Previous Video: Demonstrating How Helmets Affect Impulse and Impact Force Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen

Rearranging Newton’s Second Law to derive the force of impact equation. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:09 Newton’s Second Law 1:57 The Force of Impact equation 2:33 The paradigm shift Next Video: Calculating the Force of Impact when Stepping off a Wall Multilingual? Please help translate Flipping Physics videos! Previous Video: You Can't Run From Momentum! (a momentum introduction) Please support me on Patreon!

Name: Review of Momentum, Impact Force, and Impulse Category: Momentum and Collisions Date Added: 20170126 Submitter: Flipping Physics An important review highlighting differences between the equations for Conservation of Momentum, Impact Force and Impulse. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:17 Conservation of Momentum 1:01 An explosion is a collision in reverse 1:22 Impact Force 1:39 Impulse 2:16 Impulse equals 3 things 2:53 How many objects are in these equations? A big THANK YOU to Elle Konrad who let me borrow several of her old dance costumes! Next Video: Using Impulse to Calculate Initial Height Multilingual? Please help translate Flipping Physics videos! Previous Video: Demonstrating How Helmets Affect Impulse and Impact Force Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen Review of Momentum, Impact Force, and Impulse

Demonstrating and measuring how a helmet changes impulse, impact force and change in time during a collision. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:21 The demonstration without a helmet 1:15 The equation for Impulse 1:55 How a helmet should affect the variables 2:36 The demonstration with a helmet 3:29 Comparing with and without a helmet Next Video: Review of Momentum, Impact Force, and Impulse Multilingual? Please help translate Flipping Physics videos! Previous Video: Demonstrating Impulse is Area Under the Curve Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter, and Jennifer Larsen

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Name: Demonstrating How Helmets Affect Impulse and Impact Force Category: Momentum and Collisions Date Added: 20161208 Submitter: Flipping Physics Demonstrating and measuring how a helmet changes impulse, impact force and change in time during a collision. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:21 The demonstration without a helmet 1:15 The equation for Impulse 1:55 How a helmet should affect the variables 2:36 The demonstration with a helmet 3:29 Comparing with and without a helmet Next Video: Review of Momentum, Impact Force, and Impulse Multilingual? Please help translate Flipping Physics videos! Previous Video: Demonstrating Impulse is Area Under the Curve Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter, and Jennifer Larsen Demonstrating How Helmets Affect Impulse and Impact Force

An elastic collision is demonstrated and analyzed. Want lecture notes? This is an AP Physics 1 Topic. A big thank you to Mr. Becke for being a guest in today’s video! Content Times: 0:25 Reading and translating the problem 1:17 The demonstration 1:52 Solving for velocity final of cart 2 3:46 Measuring the velocity final of cart 2 4:25 Checking if kinetic energy is conserved 6:22 We should have converted to meters per second Next Video: Demonstrating Impulse is Area Under the Curve Multilingual? Please help translate Flipping Physics videos! Previous Video: Introductory Perfectly Inelastic Collision Problem Demonstration Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen

Name: Introductory Elastic Collision Problem Demonstration Category: Momentum and Collisions Date Added: 20161124 Submitter: Flipping Physics An elastic collision is demonstrated and analyzed. Want lecture notes? This is an AP Physics 1 Topic. A big thank you to Mr. Becke for being a guest in today’s video! Content Times: 0:25 Reading and translating the problem 1:17 The demonstration 1:52 Solving for velocity final of cart 2 3:46 Measuring the velocity final of cart 2 4:25 Checking if kinetic energy is conserved 6:22 We should have converted to meters per second Next Video: Demonstrating Impulse is Area Under the Curve Multilingual? Please help translate Flipping Physics videos! Previous Video: Introductory Perfectly Inelastic Collision Problem Demonstration Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen Introductory Elastic Collision Problem Demonstration

A perfectly inelastic collision is demonstrated and analyzed. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:08 Demonstrating the Perfectly Inelastic Collision 0:41 Known values 1:34 Using Conservation of Momentum 2:22 Both objects have the same final velocity 3:37 Measuring the final velocity 4:05 Determining the relative error 4:45 Fruit Day! Next Video: Introductory Elastic Collision Problem Demonstration Multilingual? Please help translate Flipping Physics videos! Previous Video: Introduction to Elastic and Inelastic Collisions Please support me on Patreon! Thank you to my Quality Controllers: Christopher Becke Scott Carter

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Learn about Elastic, Inelastic and Perfectly Inelastic collisions via a demonstration Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:15 The charities 1:05 Elastic collisions 2:09 Inelastic collisions 3:29 Perfectly Inelastic collisions 4:13 Demonstration #1 5:28 Demonstration #2 Next Video: Introductory Perfectly Inelastic Collision Problem Demonstration Multilingual? Please help translate Flipping Physics videos! Previous Video: Introductory Conservation of Momentum Explosion Problem Demonstration The Charities: Children With Hair Loss Alpha House Home Of New Vision American Foundation for Suicide Prevention Please support me on Patreon!

Name: Introductory Perfectly Inelastic Collision Problem Demonstration Category: Momentum and Collisions Date Added: 20161117 Submitter: Flipping Physics A perfectly inelastic collision is demonstrated and analyzed. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:08 Demonstrating the Perfectly Inelastic Collision 0:41 Known values 1:34 Using Conservation of Momentum 2:22 Both objects have the same final velocity 3:37 Measuring the final velocity 4:05 Determining the relative error 4:45 Fruit Day! Next Video: Introductory Elastic Collision Problem Demonstration Multilingual? Please help translate Flipping Physics videos! Previous Video: Introduction to Elastic and Inelastic Collisions Please support me on Patreon! Thank you to my Quality Controllers: Christopher Becke Scott Carter Introductory Perfectly Inelastic Collision Problem Demonstration

Name: Introduction to Elastic and Inelastic Collisions Category: Momentum and Collisions Date Added: 20161110 Submitter: Flipping Physics Learn about Elastic, Inelastic and Perfectly Inelastic collisions via a demonstration Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:15 The charities 1:05 Elastic collisions 2:09 Inelastic collisions 3:29 Perfectly Inelastic collisions 4:13 Demonstration #1 5:28 Demonstration #2 Next Video: Introductory Perfectly Inelastic Collision Problem Demonstration Multilingual? Please help translate Flipping Physics videos! Previous Video: Introductory Conservation of Momentum Explosion Problem Demonstration The Charities: Children With Hair Loss Alpha House Home Of New Vision American Foundation for Suicide Prevention Please support me on Patreon! Introduction to Elastic and Inelastic Collisions

 inelastic
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Now mr.p doesn’t bend his knees when stepping off a wall. What is the new force of impact? Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:18 How much does mr.p bend his knees? 1:00 Reviewing the previous problem 1:57 What changes if I don’t bend my knees? 2:41 Impulse introduction 3:36 The impulse during this collision 4:51 Why is it bad to not bend your knees? 5:22 Estimating time of collision if I don’t bend my knees 6:09 Solving for the force of impact 6:51 Review 7:28 No tomatoes were wasted in the making of this video Next Video: Proving and Explaining Impulse Approximation Multilingual? Please help translate Flipping Physics videos! Previous Video: Calculating the Force of Impact when Stepping off a Wall Please support me on Patreon!

 introduction
 impulse

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Name: Proving and Explaining Impulse Approximation Category: Momentum and Collisions Date Added: 20160922 Submitter: Flipping Physics Know when and how to use the “Impulse Approximation”. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:12 Reviewing the examples 0:43 Defining Impulse Approximation 1:41 Determining the forces during the collision 2:27 Solving for the Force Normal (or Force of Impact) 3:12 Determining our error Next Video: How to Wear A Helmet  A PSA from Flipping Physics Multilingual? Please help translate Flipping Physics videos! Previous Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall Please support me on Patreon! Proving and Explaining Impulse Approximation

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Know when and how to use the “Impulse Approximation”. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:12 Reviewing the examples 0:43 Defining Impulse Approximation 1:41 Determining the forces during the collision 2:27 Solving for the Force Normal (or Force of Impact) 3:12 Determining our error Next Video: How to Wear A Helmet  A PSA from Flipping Physics Multilingual? Please help translate Flipping Physics videos! Previous Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall Please support me on Patreon!

A 73 kg mr.p steps off a 73.2 cm high wall. If mr.p bends his knees such that he stops his downward motion and the time during the collision is 0.28 seconds, what is the force of impact caused by the ground on mr.p? Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:21 Translating the problem 1:32 Splitting the problem into parts 3:07 Substituting in known variables 4:30 Finding the final velocity for part 1 6:21 Substituting back into Force of Impact equation 7:23 Converting to pounds Next Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall Multilingual? Please help translate Flipping Physics videos! Previous Video: Instantaneous Power Delivered by a Car Engine  Example Problem Please support me on Patreon! A big thank you to Jean Gifford for donating the money for Bo and Billy’s bathrobes!

Name: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall Category: Momentum and Collisions Date Added: 20160922 Submitter: Flipping Physics Now mr.p doesn’t bend his knees when stepping off a wall. What is the new force of impact? Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:18 How much does mr.p bend his knees? 1:00 Reviewing the previous problem 1:57 What changes if I don’t bend my knees? 2:41 Impulse introduction 3:36 The impulse during this collision 4:51 Why is it bad to not bend your knees? 5:22 Estimating time of collision if I don’t bend my knees 6:09 Solving for the force of impact 6:51 Review 7:28 No tomatoes were wasted in the making of this video Next Video: Proving and Explaining Impulse Approximation Multilingual? Please help translate Flipping Physics videos! Previous Video: Calculating the Force of Impact when Stepping off a Wall Please support me on Patreon! Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall

Name: Calculating the Force of Impact when Stepping off a Wall Category: Momentum and Collisions Date Added: 20160908 Submitter: Flipping Physics A 73 kg mr.p steps off a 73.2 cm high wall. If mr.p bends his knees such that he stops his downward motion and the time during the collision is 0.28 seconds, what is the force of impact caused by the ground on mr.p? Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:21 Translating the problem 1:32 Splitting the problem into parts 3:07 Substituting in known variables 4:30 Finding the final velocity for part 1 6:21 Substituting back into Force of Impact equation 7:23 Converting to pounds Next Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall Multilingual? Please help translate Flipping Physics videos! Previous Video: Instantaneous Power Delivered by a Car Engine  Example Problem Please support me on Patreon! A big thank you to Jean Gifford for donating the money for Bo and Billy’s bathrobes! Calculating the Force of Impact when Stepping off a Wall

Name: Force of Impact Equation Derivation Category: Momentum and Collisions Date Added: 20170112 Submitter: Flipping Physics Rearranging Newton’s Second Law to derive the force of impact equation. Want lecture notes? This is an AP Physics 1 Topic. Content Times: 0:09 Newton’s Second Law 1:57 The Force of Impact equation 2:33 The paradigm shift Next Video: Calculating the Force of Impact when Stepping off a Wall Multilingual? Please help translate Flipping Physics videos! Previous Video: You Can't Run From Momentum! (a momentum introduction) Please support me on Patreon! Force of Impact Equation Derivation

The Amazing Race clip of a contestant getting hit in the face by a watermelon... real or faked?

Name: Watermelon to the Face Category: Momentum and Collisions Date Added: 20150811 Submitter: FizziksGuy The Amazing Race clip of a contestant getting hit in the face by a watermelon... real or faked? Watermelon to the Face
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