Video Discussions

Name: Nerd-A-Pult - 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 Nerd-A-Pult is the perfect tool for showing projectile motion. Content Times: 0:02 Introducing the Nerd-A-Pult 0:43 Demonstrating the marshmallow capabilities of the Nerd-A-Pult 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 y-direct…

Name: A Brief Look at the Force of Drag using Numerical Modeling (or The Euler Method) Category: Dynamics Date Added: 22 May 2014 - 05:01 PM Submitter: Flipping Physics Short Description: None Provided This is how you include air resistance in projectile motion. It requires the Drag Force and Numerical Modeling (or the Euler Method). It is also very helpful to use a spreadsheet to do the calculations. I prove a statement from a previous projectile motion problem video, "Air resistance decreases the x displacement of the ball by less than 1 cm." Content Times: 0:22 The statement this video proves 1:01 The basic concept of air resistance 1:54 The Free Body Diag…

Name: (Part 2 of 2) An Introductory Projectile Motion Problem with an Initial Horizontal Velocity Category: Kinematics Date Added: 22 May 2014 - 04:57 PM Submitter: Flipping Physics Short Description: None Provided Now that we have dropped the ball into the bucket, we can determine the final velocity of the ball right before it strikes the bucket. Don't forget that velocity is a vector and has both magnitude and direction. Yep, component vector review! Content Times: 0:34 Finding the final velocity in the y direction. 1:52 We need to find the hypotenuse! 2:28 Finding the final velocity in the x direction. 2:57 Finding the magnitude of the final velocity. 4:…

Name: (Part 1 of 2) An Introductory Projectile Motion Problem with an Initial Horizontal Velocity Category: Kinematics Date Added: 22 May 2014 - 04:49 PM Submitter: Flipping Physics Short Description: None Provided Can you drop a ball from a moving vehicle and get it to land in a bucket? You can using Physics! In this video we solve an introductory projectile motion problem involving an initial horizontal velocity and predict how far in front of the bucket to drop the ball. Content Times: 0:17 Reading the problem. 0:41 Visualizing the problem. 1:18 Translating the problem. 2:31 Converting from miles per hour to meters per second. 3:10 Two common mistakes ab…

Name: Introduction to Projectile Motion Category: Kinematics Date Added: 22 May 2014 - 04:44 PM Submitter: Flipping Physics Short Description: None Provided My strategy for solving any projectile motion problem. You need to split the variables in to the x and y directions and solve for time. Sounds simple and it really is, usually. Content Times: 0:11 Review of Linear Motion Examples 0:57 Introducing Projectile Motion! 1:48 Basic strategy for solving any projectile motion problem 2:06 The y-direction (UAM) 3:22 The x-direction (constant velocity) 4:36 How many knowns do you need in each direction? 5:41 What do we usually solve for? 6:12 The Review Vie…

Name: A Visually Complicated Vector Addition Problem using Component Vectors Category: Kinematics Date Added: 22 May 2014 - 04:43 PM Submitter: Flipping Physics Short Description: None Provided This visually confusing tip-to-tail vector addition problem can be solved just like our previous problems. Give your vectors names, draw a vector diagram, break vectors in to components, redraw the vector diagram, create a data table, add columns and solve using basic trig. Content Times: 0:14 Reading, visualizing, and translating the problem. 1:13 Drawing the vector diagram. 2:06 Breaking vector C in to its components. 3:22 Redrawing the vector diagram (twice). 4:16…

Name: Using a Data Table to Make Vector Addition Problems Easier Category: Kinematics Date Added: 22 May 2014 - 04:42 PM Submitter: Flipping Physics Short Description: None Provided Any vector addition problem can be made easier by using a data table; no matter how many vectors. Content Times: 0:13 Reviewing the problem. 0:46 Starting the Data Table. 1:13 Filling in the table: Vector A 2:02 Filling in the table: Vector C 2:33 Filling in the table: Vector B 3:11 Finding the Components of the Resultant Vector, R. 3:59 The Review View Video

Name: Introductory Vector Addition Problem using Component Vectors Category: Kinematics Date Added: 22 May 2014 - 04:40 PM Submitter: Flipping Physics Short Description: None Provided A simple, introductory vector addition problem that combines the concepts of vectors, cardinal directions, tip-to-tail vector addition and component vectors. Content Times: 0:14 Reading and understanding the problem. 1:25 Drawing the Vector Diagram. 2:28 A common mistake about where to place the arrowhead on the Resultant Vector. 3:39 This is NOT a Vector Diagram! 4:34 How NOT to solve the problem. 5:12 Breaking vector B in to its component in the y direction. 6:02 Breaking …

Name: Introduction to Vector Components Category: Kinematics Date Added: 22 May 2014 - 04:39 PM Submitter: Flipping Physics Short Description: None Provided Components of Vectors are an important piece to understand how vectors work. In this video we learn how to "break" or "resolve" vectors in to their component pieces. Content Times: 0:14 The example displacement vector d 0:44 Finding the y component of vector d 2:17 Finding the x component of vector d 3:18 What does it mean to be a component of a vector? 4:14 A common question about vector components 4:51 Showing mathematically that the vector components add up to the vector 6:48 Explaining how d in th…

Name: How to use Cardinal Directions with Vectors Category: Kinematics Date Added: 22 May 2014 - 04:37 PM Submitter: Flipping Physics Short Description: None Provided Many students struggle with understanding Cardinal Directions. So this is a very basic video describing how to use cardinal directions with vectors. Content Times: 0:12 Previous example summary 0:48 Two suggestions for working with Cardinal Directions 1:58 East of North = East "from" North 2:18 The 8 possible direcitons 3:51 Two equivalent ways to describe the same vector 4:51 NE, SE, SW, and NW 5:24 The review View Video

Name: Introductory Tip-to-Tail 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 Tip-to-Tail 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 …

Name: Introduction to Tip-to-Tail 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 Tip-to-Tail 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 V…

Name: Common Free-Fall Pitfalls Category: Kinematics Date Added: 22 May 2014 - 04:32 PM Submitter: Flipping Physics Short Description: None Provided Yes, there are mistakes that many people make when it comes to free-fall acceleration problems. I dispel many misconceptions and explain both why people think they are true and why they actually aren't. Oh, and there are some special effects too! Content Times: 0:14 Review of the Basics of Free-Fall 1:04 1st Misconception - The acceleration on the way up is positive 2:09 2nd Misconception - The initial velocity going upward is zero 2:45 3rd Misconception - A thrown ball will accelerate faster than a dropped ball…

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 free-fall 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 …

Name: Dropping Dictionaries Doesn't Defy Gravity, Duh! Category: Kinematics Date Added: 22 May 2014 - 04:29 PM Submitter: Flipping Physics Short Description: None Provided Video Proof of the Mass Independence of the Acceleration due to Gravity and a little dancing. Content Times: 0:14 Reviewing the mass independence of free-fall acceleration. 0:56 1 book 1:36 What's a boom box? 2:07 All 4 videos together 2:31 We can dance if we want to 3:25 Thank you very much for learning with me today View Video

Name: A Free-Fall 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 free-fall problem where you have to identify that the velocity at the top of the path is zero in the y-direciton. Furthermore, you have to look at it from the perspective of the whole event and splitting the problem into two different parts. A classic free-fall 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 par…

Name: Creating a Position vs. Time Graph using Stop Motion Photography Category: Kinematics Date Added: 22 May 2014 - 04:26 PM Submitter: Flipping Physics Short Description: None Provided We talk about a lot of graphs in the theoretical sense. In this video we are actually going to create a position versus time graph in a real sense. By using stop motion photography and stopping a ball at various intervals while falling, we will create a position as a function of time graph. Content Times: 0:23 Identifying the Position vs. Time graph we are going to create 0:46 A single video slice of free-fall 1:19 Slow the video down to 1/8th speed 1:50 Creating the graph …

Name: The Drop and Upward Throw of a Ball are Very Similar Category: Kinematics Date Added: 22 May 2014 - 04:25 PM Submitter: Flipping Physics Short Description: None Provided Previously we determined the motion graphs for dropping a ball from 2.0 meters and throwing a ball up to 2.0 meters and catching it again. In this video I show that the reverse of the drop coupled with the drop itself is the same thing as throwing the ball upward. Make sense? Okay, watch the video. Content Times: 0:13 Reviewing the previous graphs 0:25 The drop is the same as the 2nd half of the drop 0:48 Dropping the medicine ball in reverse 1:16 Bobby reviews 1:35 Links to Previous …

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 Free-Fall 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 Velocit…

Name: Graphing the Drop of a Ball from 2.0 Meters - An Introductory Free-Fall 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

Name: Dropping a Ball from 2.0 Meters - An Introductory Free-Fall Acceleration Problem Category: Kinematics Date Added: 22 May 2014 - 04:20 PM Submitter: Flipping Physics Short Description: None Provided In this introductory free-fall acceleration problem we analyze a video of a medicine ball being dropped to determine the final velocity and the time in free-fall. 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…

Name: Analyzing the Apollo 15 Feather and Hammer Drop - A Basic, Introductory Free-Fall Problem Category: Kinematics Date Added: 21 May 2014 - 03:54 PM Submitter: Flipping Physics Short Description: None Provided Apollo 15 Video Courtesy of NASA: The 1971 Feather and Hammer Drop Experiment performed by Astronaut David Scott. We analyze the experiment to determine the height from which the feather and hammer were dropped. It is a great, basic, introductory free-fall problem. Content Times: 0:19 Why the experiment was done. 0:32 Let's enjoy the video 1:27 Beginning to analyze the video 2:23 Using the Frame Rate 3:00 Counting the frames 3:50 Solving for the i…

Name: Introduction to Free-Fall and the Acceleration due to Gravity Category: Kinematics Date Added: 21 May 2014 - 03:52 PM Submitter: Flipping Physics Short Description: None Provided In this lesson we extend our knowledge of Uniformly Accelerated Motion to include freely falling objects. We talk about what Free-Fall means, how to work with it and how to identify and object in Free-Fall. Today I get to introduce so many of my favorites: the medicine ball, the vacuum that you can breathe and, of course, little g. Content Times: 0:22 An Example of An Object in Free-Fall 0:54 Textbook definition of a freely falling object 1:11 We have not defined a "Force" so t…

Name: Reviewing One Dimensional Motion with the Table of Friends Category: Kinematics Date Added: 21 May 2014 - 03:51 PM Submitter: Flipping Physics Short Description: None Provided We get to start our Table of Friends today. Dimensions are your friends and there are so many dimensions to keep track of, so we create our Table of Friends to help us keep track of them. Today's friends have to do with One Dimensional Motion. Content Times: 0:35 Naming all 5 friends 1:13 Relative Error 1:40 Displacement 2:01 Speed 2:55 Velocity 3:14 How can we forget Delta? 4:24 Acceleration 4:46 The Review View Video

Name: Graphical UAM Example Problem Category: Kinematics Date Added: 21 May 2014 - 03:48 PM Submitter: Flipping Physics Short Description: None Provided Again with the graphs? Yes. Absolutely Yes. Graphs are such an important part of any science, especially physics. The more you work with graphs, the more you will understand them. Here we combine graphs and uniformly accelerated motion. Enjoy. Content Times: 0:29 Reading the Problem 1:02 How do we know it is UAM from the graph? 1:26 Two different, equivalent equations for acceleration 2:41 Finding acceleration 3:23 Graphing acceleration vs. time 3:44 The general shape of the position vs. time graph 4:53 D…