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This time in our projectile motion problem, we know the displacement in the ydireciton and we are solving for the displacement in the xdireciton. We could you use the quadratic formula and I even show you how, however, I also show you the way I recommend doing it which avoids the quadratic formula. Content Times: 0:14 Reading the problem 0:55 Comparing the previous projectile motion problem to the current one 1:16 Breaking the initial velocity in to its components 1:44 Listing the givens 2:27 Beginning to solve the problem in the ydirection 3:08 The Quadratic Formula! 5:49 How to solve it without using the quadratic formula. Solve for Velocity Final in the ydirection first 6:59 And then solve for the change in time 8:12 Solving for the displacement in the xdirection 9:01 Showing that it works 9:43 The Review Want [url="http://www.flippingphysics.com/anotherprojectilemotion.html"]Lecture Notes[/url]? Next Video: Understanding the [url="http://www.flippingphysics.com/rangeequation.html"]Range Equation[/url] of Projectile Motion Previous Projectile Motion Problem: [url="http://www.flippingphysics.com/nerdapult.html"]NerdAPult[/url]  An Introductory Projectile Motion Problem Want a NerdAPult? You can purchase one at: [url="http://marshmallowcatapults.com"]http://marshmallowcatapults.com[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url]

Name: Understanding the Range Equation of Projectile Motion Category: Kinematics Date Added: 10 June 2014  02:03 PM Submitter: Flipping Physics Short Description: None Provided The Horizontal Range of a Projectile is defined as the horizontal displacement of a projectile when the displacement of the projectile in the ydirection is zero. This video explains how to use the equation, why a launch angle of 45° gives the maximum range and why complimentary angles give the same range. Content Times: 0:16 Defining Range 0:50 How can the displacement in the ydirection be zero? 1:21 The variables in the equation 2:09 g is Positive! 3:05 How to get the maximum range 4:17 What dimensions to use in the equation 5:19 The shape of the sin(θ) graph 6:17 sin(2·30°) = sin(2·60°) 7:35 A graph of the Range of various Launch Angles 8:18 The Review Want View Video

Name: NerdAPult #2  Another Projectile Motion Problem Category: Kinematics Date Added: 03 June 2014  12:29 PM Submitter: Flipping Physics Short Description: None Provided This time in our projectile motion problem, we know the displacement in the ydireciton and we are solving for the displacement in the xdireciton. We could you use the quadratic formula and I even show you how, however, I also show you the way I recommend doing it which avoids the quadratic formula. Content Times: 0:14 Reading the problem 0:55 Comparing the previous projectile motion problem to the current one 1:16 Breaking the initial velocity in to its components 1:44 Listing the givens 2:27 Beginning to solve the problem in the ydirection 3:08 The Quadratic Formula! 5:49 How to solve it without using the quadratic formula. Solve for Velocity Final in the ydirection first 6:59 And then solve for the change in time 8:12 Solving for the displacement in the xdirection 9:01 Showing that it works 9:43 The Review Want View Video

An introductory projectile motion problem where you have to break the initial velocity vector in to its components before you can work with it. The NerdAPult is the perfect tool for showing projectile motion. Content Times: 0:02 Introducing the NerdAPult 0:43 Demonstrating the marshmallow capabilities of the NerdAPult 1:18 Reading the problem 2:26 Starting to solve the problem 3:03 What do we do with the initial velocity? 3:45 Solving for the initial velocity in the ydirection 4:27 Solving for the initial velocity in the xdirection 5:13 Deciding which direction to start working with 5:38 Solving for the change in time in the xdirection 6:34 Solving for the displacement in the ydirection 7:54 Proving that our answer is correct 8:58 The Review [url="http://www.flippingphysics.com/nerdapult.html"]Want Lecture Notes?[/url] Next Problem: [url="http://www.flippingphysics.com/measuringvi.html"]NerdAPult  Measuring Initial Velocity[/url] Previous Problem: [url="http://www.flippingphysics.com/projectilemotionproblempart1of2.html"]An Introductory Projectile Motion Problem with an Initial Horizontal Velocity[/url] Want a NerdAPult? You can purchase one at [url="http://marshmallowcatapults.com"]marshmallowcatapults.com[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url]

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Name: NerdAPult  An Introductory Projectile Motion Problem Category: Kinematics Date Added: 23 May 2014  02:05 PM Submitter: Flipping Physics Short Description: None Provided An introductory projectile motion problem where you have to break the initial velocity vector in to its components before you can work with it. The NerdAPult is the perfect tool for showing projectile motion. Content Times: 0:02 Introducing the NerdAPult 0:43 Demonstrating the marshmallow capabilities of the NerdAPult 1:18 Reading the problem 2:26 Starting to solve the problem 3:03 What do we do with the initial velocity? 3:45 Solving for the initial velocity in the ydirection 4:27 Solving for the initial velocity in the xdirection 5:13 Deciding which direction to start working with 5:38 Solving for the change in time in the xdirection 6:34 Solving for the displacement in the ydirection 7:54 Proving that our answer is correct 8:58 The Review View Video

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This is a very basic introductory to TiptoTail Vector Addition Problem using a motorized toy car that I made. I don't just talk about it in a general sense, I actually show the different vectors being added together. Content Times: 0:16 Problem introduction 0:36 Determining the velocity of the track 1:43 Defining our givens 3:08 Visual representation of our vectors 3:56 Slow Velocity Racer on the track 4:20 Drawing the resultant vector 5:03 Mathematically finding the magnitude of the resultant velocity vector 6:28 Mathematically finding the direction of the resultant velocity vector 8:45 Summarizing and understanding our results 9:20 49 + 42 = 65? 10:57 The Review [url="http://www.flippingphysics.com/tiptotailvectoraddition.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/cardinaldirections.html"]How to use Cardinal Directions with Vectors[/url] Previous Video: [url="http://www.flippingphysics.com/vectorsandscalars.html"]Introduction to TiptoTail Vector Addition, Vectors and Scalars[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url]
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Name: Introductory TiptoTail Vector Addition Problem Category: Kinematics Date Added: 22 May 2014  04:36 PM Submitter: Flipping Physics Short Description: None Provided This is a very basic introductory to TiptoTail Vector Addition Problem using a motorized toy car that I made. I don't just talk about it in a general sense, I actually show the different vectors being added together. Content Times: 0:16 Problem introduction 0:36 Determining the velocity of the track 1:43 Defining our givens 3:08 Visual representation of our vectors 3:56 Slow Velocity Racer on the track 4:20 Drawing the resultant vector 5:03 Mathematically finding the magnitude of the resultant velocity vector 6:28 Mathematically finding the direction of the resultant velocity vector 8:45 Summarizing and understanding our results 9:20 49 + 42 = 65? 10:57 The Review View Video

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This is a very basic introduction to TiptoTail Vector Addition using a motorized toy car that I made. Also included is an introduction to Vectors and Scalars, their definitions and some variable examples of Vectors and Scalars. Content Times: 0:11 Slow Velocity Racer! 0:48 Determining the speed of Slow Velocity Racer! 1:55 Which track for Slow Velocity Racer to move the fastest? 2:54 How fast will Slow Velocity Racer move between the two tracks? 3:18 How fast will Slow Velocity Racer move on the top track? 4:03 TiptoTail Vector Addition 5:45 Defining Vectors 6:15 Defining Scalars 6:38 Variable Examples of Vectors 7:02 Variable Examples of Scalars 7:28 Montage of Examples of Scalars 8:18 Defining Magnitude 9:20 Scalars can be negative 9:56 The Review [url="http://www.flippingphysics.com/vectorsandscalars.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/tiptotailvectoraddition.html"]Introductory TiptoTail Vector Addition Problem[/url] Previous Video: [url="http://www.flippingphysics.com/dontdropyourcamera.html"]Don't Drop Your Camera 5.0 Seconds After Liftoff[/url] You can learn about my author cousin, Amy Hassinger @ [url="http://amyhassinger.com"]http://amyhassinger.com[/url] [url="http://www.flippingphysics.com/give.html"]1¢/minute[/url]
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Name: Introduction to TiptoTail Vector Addition, Vectors and Scalars Category: Kinematics Date Added: 22 May 2014  04:35 PM Submitter: Flipping Physics Short Description: None Provided This is a very basic introduction to TiptoTail Vector Addition using a motorized toy car that I made. Also included is an introduction to Vectors and Scalars, their definitions and some variable examples of Vectors and Scalars. Content Times: 0:11 Slow Velocity Racer! 0:48 Determining the speed of Slow Velocity Racer! 1:55 Which track for Slow Velocity Racer to move the fastest? 2:54 How fast will Slow Velocity Racer move between the two tracks? 3:18 How fast will Slow Velocity Racer move on the top track? 4:03 TiptoTail Vector Addition 5:45 Defining Vectors 6:15 Defining Scalars 6:38 Variable Examples of Vectors 7:02 Variable Examples of Scalars 7:28 Montage of Examples of Scalars 8:18 Defining Magnitude 9:20 Scalars can be negative 9:56 The Review View Video

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An advanced freefall acceleration problem involving 2 parts and 2 objects. Problem: You are wearing your rocket pack (total mass = 75 kg) that accelerates you upward at a constant 10.5 m/s^2. While preparing to take pictures of the beautiful view, you drop your camera 5.0 seconds after liftoff. 5.0 seconds after you drop the camera, (a) what is the camera's velocity and (b) how far are you from the camera? Content Times: 0:17 Reading the problem 1:26 Understanding the problem using a picture 2:10 Listing every known variable 3:22 Which part do we start solving first? 3:47 What do we solve for in part 1? 4:46 That's a lot of subscripts, why? 5:24 Starting to solve the problem. Finding the final velocity for part 1. 6:32 Solving for the final velocity for part 2 for the camera 7:46 Why is the final velocity for part 2 for the camera positive? 9:10 Finding the displacement for part 2 for the camera 9:55 Finding the displacement for part 2 for you 10:42 Finding the distance between you and the camera at the very end 11:27 The Review [url="http://www.flippingphysics.com/dontdropyourcamera.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/vectorsandscalars.html"]Introduction to TiptoTail Vector Addition, Vectors and Scalars[/url] Previous Video: [url="http://www.flippingphysics.com/droppingdictionaries.html"]Dropping Dictionaries Doesn't Defy Gravity, Duh![/url]

Name: Don't Drop Your Camera 5.0 Seconds After Liftoff Category: Kinematics Date Added: 22 May 2014  04:31 PM Submitter: Flipping Physics Short Description: None Provided An advanced freefall acceleration problem involving 2 parts and 2 objects. Problem: You are wearing your rocket pack (total mass = 75 kg) that accelerates you upward at a constant 10.5 m/s^2. While preparing to take pictures of the beautiful view, you drop your camera 5.0 seconds after liftoff. 5.0 seconds after you drop the camera, (a) what is the camera's velocity and ( how far are you from the camera? Content Times: 0:17 Reading the problem 1:26 Understanding the problem using a picture 2:10 Listing every known variable 3:22 Which part do we start solving first? 3:47 What do we solve for in part 1? 4:46 That's a lot of subscripts, why? 5:24 Starting to solve the problem. Finding the final velocity for part 1. 6:32 Solving for the final velocity for part 2 for the camera 7:46 Why is the final velocity for part 2 for the camera positive? 9:10 Finding the displacement for part 2 for the camera 9:55 Finding the displacement for part 2 for you 10:42 Finding the distance between you and the camera at the very end 11:27 The Review Want Lecture Notes? Next Video: Introduction to TiptoTail Vector Addition, Vectors and Scalars Previous Video: Dropping Dictionaries Doesn't Defy Gravity, Duh! View Video

A FreeFall Problem That You Must Split Into Two Parts
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This is a complicated freefall problem where you have to identify that the velocity at the top of the path is zero in the ydireciton. Furthermore, you have to look at it from the perspective of the whole event and splitting the problem into two different parts. A classic freefall acceleration example problem. Content Times: 0:45 Reading the problem 1:12 Translating the problem to physics 3:04 Starting with the whole event 4:36 Splitting the problem into two parts 6:06 Solving part 1: Going up 8:17 Finishing the problem 9:05 An alternate solution 9:38 The review [url="http://www.flippingphysics.com/freefallproblem.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/droppingdictionaries.html"]Dropping Dictionaries Doesn't Defy Gravity, Duh![/url] Previous Video: [url="http://www.flippingphysics.com/commonfreefallpitfalls.html"]Common FreeFall Pitfalls[/url]
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Name: A FreeFall Problem That You Must Split Into Two Parts Category: Kinematics Date Added: 22 May 2014  04:27 PM Submitter: Flipping Physics Short Description: None Provided This is a complicated freefall problem where you have to identify that the velocity at the top of the path is zero in the ydireciton. Furthermore, you have to look at it from the perspective of the whole event and splitting the problem into two different parts. A classic freefall acceleration example problem. Content Times: 0:45 Reading the problem 1:12 Translating the problem to physics 3:04 Starting with the whole event 4:36 Splitting the problem into two parts 6:06 Solving part 1: Going up 8:17 Finishing the problem 9:05 An alternate solution 9:38 The review View Video

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In the previous lesson we dropped a ball from 2.0 meters above the ground and now we throw one up to a height of 2.0 meters. We do this in order to understand the similarities between the two events. Oh, and of course we draw some graphs. This is an Introductory FreeFall Acceleration Problem Content Times: 0:18 Reviewing the previous lesson 0:34 Reading the new problem 1:26 Acceleration vs. time 1:59 Velocity vs. time 2:49 Position vs. time 4:16 The Velocity at the top is ZERO! 5:50 Comparing throwing the ball to dropping the ball 6:56 Finding the total change in time 7:44 Finding the velocity initial 9:47 The Review [url="http://www.flippingphysics.com/throwingaball.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/dropandupwardthrow.html"]The Drop and Upward Throw of a Ball are Very Similar[/url] Previous Video: [url="http://www.flippingphysics.com/graphingthedropofaball.html"]Graphing the Drop of a Ball from 2.0 Meters[/url]  An Introductory FreeFall Acceleration Problem

Name: Throwing a Ball up to 2.0 Meters & Proving the Velocity at the Top is Zero Category: Kinematics Date Added: 22 May 2014  04:23 PM Submitter: Flipping Physics Short Description: None Provided In the previous lesson we dropped a ball from 2.0 meters above the ground and now we throw one up to a height of 2.0 meters. We do this in order to understand the similarities between the two events. Oh, and of course we draw some graphs. This is an Introductory FreeFall Acceleration Problem Content Times: 0:18 Reviewing the previous lesson 0:34 Reading the new problem 1:26 Acceleration vs. time 1:59 Velocity vs. time 2:49 Position vs. time 4:16 The Velocity at the top is ZERO! 5:50 Comparing throwing the ball to dropping the ball 6:56 Finding the total change in time 7:44 Finding the velocity initial 9:47 The Review View Video

This video continues a problem we already solved involving dropping a ball from 2.0 meters. Now we determine how to draw the position, velocity and acceleration as functions of time graphs. Content Times: 0:17 Reviewing the previous lesson 1:00 Acceleration as a function of time 1:31 Velocity as a function of time 2:39 Position as a function of time 3:56 The Review [url="http://www.flippingphysics.com/graphingthedropofaball.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/throwingaball.html"]Throwing a Ball up to 2.0 Meters & Proving the Velocity at the Top is Zero[/url] Previous Video: [url="http://www.flippingphysics.com/droppingaballfrom20meters.html"]Dropping a Ball from 2.0 Meters[/url]  An Introductory FreeFall Acceleration Problem

Name: Graphing the Drop of a Ball from 2.0 Meters  An Introductory FreeFall Acceleration Problem Category: Kinematics Date Added: 22 May 2014  04:22 PM Submitter: Flipping Physics Short Description: None Provided This video continues a problem we already solved involving dropping a ball from 2.0 meters. Now we determine how to draw the position, velocity and acceleration as functions of time graphs. Content Times: 0:17 Reviewing the previous lesson 1:00 Acceleration as a function of time 1:31 Velocity as a function of time 2:39 Position as a function of time 3:56 The Review View Video

In this introductory freefall acceleration problem we analyze a video of a medicine ball being dropped to determine the final velocity and the time in freefall. Included are three common mistakes students make. "Why include mistakes?" you might ask. Well, it is important to understand what happens when you make mistakes so that you can recognize them in the future. There is also brief description of "parallax" and how it affects what you see in the video compared to reality. Content TImes: 0:26 Reading and viewing the problem 0:50 Describing the parallax issue 1:52 Translating the problem to physics 2:05 1st common mistake: Velocity final is not zero 3:09 Finding the 3rd UAM variable, initial velocity 3:56 Don't we need to know the mass of the medicine ball? 4:35 Solving for the final velocity in the y direction: part (a) 5:39 Identifying our 2nd common mistake: Square root of a negative number? 7:56 Solving for the change in time: part (b) 8:28 Identifying our 3rd common mistake: Negative time? 9:36 Please don't write negative down! 10:27 Does reality match the physics? 11:07 The Review [url="http://www.flippingphysics.com/droppingaballfrom20meters.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/graphingthedropofaball.html"]Graphing the Drop of a Ball from 2.0 Meters[/url]  An Introductory FreeFall Acceleration Problem Previous Video: [url="http://www.flippingphysics.com/apollo15featherandhammerdrop.html"]Analyzing the Apollo 15 Feather and Hammer Drop[/url]  A Basic Introductory FreeFall Problem
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Name: Dropping a Ball from 2.0 Meters  An Introductory FreeFall Acceleration Problem Category: Kinematics Date Added: 22 May 2014  04:20 PM Submitter: Flipping Physics Short Description: None Provided In this introductory freefall acceleration problem we analyze a video of a medicine ball being dropped to determine the final velocity and the time in freefall. Included are three common mistakes students make. "Why include mistakes?" you might ask. Well, it is important to understand what happens when you make mistakes so that you can recognize them in the future. There is also brief description of "parallax" and how it affects what you see in the video compared to reality. Content TImes: 0:26 Reading and viewing the problem 0:50 Describing the parallax issue 1:52 Translating the problem to physics 2:05 1st common mistake: Velocity final is not zero 3:09 Finding the 3rd UAM variable, initial velocity 3:56 Don't we need to know the mass of the medicine ball? 4:35 Solving for the final velocity in the y direction: part (a) 5:39 Identifying our 2nd common mistake: Square root of a negative number? 7:56 Solving for the change in time: part ( 8:28 Identifying our 3rd common mistake: Negative time? 9:36 Please don't write negative down! 10:27 Does reality match the physics? 11:07 The Review Want Lecture Notes? Next Video: Graphing the Drop of a Ball from 2.0 Meters  An Introductory FreeFall Acceleration Problem Previous Video: Analyzing the Apollo 15 Feather and Hammer Drop  A Basic Introductory FreeFall Problem View Video

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In this lesson we continue to use what we have learned about solving Uniformly Accelerated Motion (UAM) problems. This problem is more complicated because it involves two, interconnected parts. Content Times: 0:26 Reading the problem 0:46 Seeing the problem 1:11 Translating from words to physics 1:58 Splitting the problem into two parts 3:13 Fixing the knowns (common mistakes) 4:35 How do we know we can use the UAM equations? 5:19 Drawing a picture to better understand the problem 6:00 Finding the missing known 7:29 What are we finding again? 8:45 The end of part 1 is the start of part 2! 9:29 Beginning to solve the problem :) 11:19 Solving part (b) 13:53 What is wrong with solving the whole thing at once? 16:03 Rapping it up! [url="http://www.flippingphysics.com/toycaruamproblem.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/thehumilitysoapboxndashuniformlyvsuniformally.html"]The Humility Soapbox  Uniformly vs. Uniformally[/url] Previous Video: [url="http://www.flippingphysics.com/introductoryuniformlyacceleratedmotionproblem.html"]Introductory Uniformly Accelerated Motion Problem  A Braking Bicycle[/url]

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Name: Toy Car UAM Problem with Two Difference Accelerations Category: Kinematics Date Added: 21 May 2014  03:45 PM Submitter: Flipping Physics Short Description: None Provided In this lesson we continue to use what we have learned about solving Uniformly Accelerated Motion (UAM) problems. This problem is more complicated because it involves two, interconnected parts. Content Times: 0:26 Reading the problem 0:46 Seeing the problem 1:11 Translating from words to physics 1:58 Splitting the problem into two parts 3:13 Fixing the knowns (common mistakes) 4:35 How do we know we can use the UAM equations? 5:19 Drawing a picture to better understand the problem 6:00 Finding the missing known 7:29 What are we finding again? 8:45 The end of part 1 is the start of part 2! 9:29 Beginning to solve the problem 11:19 Solving part ( 13:53 What is wrong with solving the whole thing at once? 16:03 Rapping it up! Want Lecture Notes? Next Video: The Humility Soapbox  Uniformly vs. Uniformally Previous Video: Introductory Uniformly Accelerated Motion Problem  A Braking Bicycle View Video

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This video continues what we learned about UAM in our previous lesson. We work through a introductory problem involving a bicycle on which we have applied the brakes. Content Times: 0:28 Reading the problem 0:48 Seeing the problem 1:15 Translating the problem to physics 2:35 Why is it final speed and not velocity? 3:48 Solving for the acceleration 6:03 Converting initial velocity to meters per second 7:32 Solving for distance traveled. 8:05 A common mistake 10:02 Two more ways to solve for the distance traveled. 10:45 Why didn't the speedometer show the correct final speed? [url="http://www.flippingphysics.com/toycaruamproblem.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/toycaruamproblem.html"]Toy Car UAM Problem with Two Difference Accelerations[/url] Previous Video: [url="http://www.flippingphysics.com/introductoryuniformlyacceleratedmotionproblem.html"]Introduction to Uniformly Accelerated Motion with Examples of Objects in UAM[/url]

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Name: Introductory Uniformly Accelerated Motion Problem  A Braking Bicycle Category: Kinematics Date Added: 21 May 2014  03:43 PM Submitter: Flipping Physics Short Description: None Provided This video continues what we learned about UAM in our previous lesson. We work through a introductory problem involving a bicycle on which we have applied the brakes. Content Times: 0:28 Reading the problem 0:48 Seeing the problem 1:15 Translating the problem to physics 2:35 Why is it final speed and not velocity? 3:48 Solving for the acceleration 6:03 Converting initial velocity to meters per second 7:32 Solving for distance traveled. 8:05 A common mistake 10:02 Two more ways to solve for the distance traveled. 10:45 Why didn't the speedometer show the correct final speed? View Video

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This video starts with a simple acceleration problem and then addresses a commonly held misconception that a negative acceleration always means you are slowing down. I do this by way of examples. Kate (my wife) drove the Prius with a camera suction cupped to the window and videoed me riding my bike several times. In the end I ended up with four different examples on the screen at once and 25 different video layers to describe it all. I am really proud about how well it worked. Enjoy. Content Times: 0:26 Reading the problem 0:40 Seeing the problem 1:14 Translating the words to Physics 1:54 Solving the problem 3:50 Why is the number on the bike positive? 4:48 How can the bike be speeding up if the acceleration is negative? 5:50 Comparing velocity and acceleration directions 7:28 All four bike examples on the screen at the same time 7:53 Why isn't there a direction on our answer? 8:51 Outtakes or how the bike riding was filmed [url="http://www.flippingphysics.com/abasicaccelerationexampleproblemandunderstandingaccelerationdirection.html"]Want Lecture Notes?[/url] Next Video: [url="http://www.flippingphysics.com/walkingpositionvelocityandaccelerationasafunctionoftimegraphs.html"]Walking Position, Velocity and Acceleration as a Function of Time Graphs[/url] Previous Video: [url="http://www.flippingphysics.com/introductiontoaccelerationwithpriusbrakeslammingexampleproblem.html"]Introduction to Acceleration with Prius Brake Slamming Example Problem[/url]

Name: A Basic Acceleration Example Problem and Understanding Acceleration Direction Category: Kinematics Date Added: 21 May 2014  08:53 AM Submitter: Flipping Physics Short Description: None Provided This video starts with a simple acceleration problem and then addresses a commonly held misconception that a negative acceleration always means you are slowing down. I do this by way of examples. Kate (my wife) drove the Prius with a camera suction cupped to the window and videoed me riding my bike several times. In the end I ended up with four different examples on the screen at once and 25 different video layers to describe it all. I am really proud about how well it worked. Enjoy. Content Times: 0:26 Reading the problem 0:40 Seeing the problem 1:14 Translating the words to Physics 1:54 Solving the problem 3:50 Why is the number on the bike positive? 4:48 How can the bike be speeding up if the acceleration is negative? 5:50 Comparing velocity and acceleration directions 7:28 All four bike examples on the screen at the same time 7:53 Why isn't there a direction on our answer? 8:51 Outtakes or how the bike riding was filmed View Video
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