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Name: When is a Pendulum in Simple Harmonic Motion? Category: Oscillations Date Added: 20180422 Submitter: Flipping Physics Demonstrating when a pendulum is in simple harmonic motion. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:09 Reviewing simple harmonic motion 0:24 Showing a pendulum in simple harmonic motion 1:47 Velocities in simple harmonic motion 2:15 Accelerations in simple harmonic motion 2:57 A pendulum’s restoring force 5:07 A maximum of 15° Thank you to Anish, Kevin, and Olivia for being my “substitute students” in this video! Multilingual? Please help translate Flipping Physics videos! Previous Video: Horizontal vs. Vertical MassSpring System Please support me on Patreon! Thank you to Christopher Becke, Jonathan Everett, and Aarti Sangwan for being my Quality Control Team for this video. Thank you to Youssef Nasr for transcribing the English subtitles of this video. When is a Pendulum in Simple Harmonic Motion?

I've been extremely curious on how much Physics Education professional dart players have on shooting? It's quite impressive to throw 3 darts in such a small group repeatedly without any fixed sights. If you have any Physics, mathematics, knowledge,suggestion to this either by text, video, illustration would you be so kind to share? Im looking for anything and everything to do with start to finish with throwing and standing also throwing a Steel Tip Dart (with a flight and its uses along with balance and it's shaft) The functions of each piece of the process compared to it's closest similarities. Thank You So Much.


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View File SimuLAB: Universal Gravitation APlusPhysics Simulation Interactive simulation to explore the basic relationships in Newton's Law of Universal Gravitation using Geogebra. Submitter FizziksGuy Submitted 11/29/2017 Category UCM & Gravity

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Name: AP Physics C: Universal Gravitation Review (Mechanics) Category: Oscillations & Gravity Date Added: 20171222 Submitter: Flipping Physics Calculus based review of Universal Gravitation including Newton’s Universal Law of Gravitation, solving for the acceleration due to gravity in a constant gravitational field, universal gravitational potential energy, graphing universal gravitational potential energy between an object and the Earth, three example problems (binding energy, escape velocity and orbital energy), and Kepler’s three laws. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? At 6:01 this video addresses an error in the Universal Gravitational Potential Energy Graph from the video's previous iteration. Content Times: 0:10 Newton’s Universal Law of Gravitation 1:52 Solving for the acceleration due to gravity 2:02 Universal Gravitational Potential Energy 4:52 Graph of Universal Gravitational Potential Energy between an object and the Earth 6:01 Correcting the Universal Gravitational Potential Energy Graph 7:30 Binding Energy Example Problem 9:41 Escape Velocity Example Problem 11:19 Orbital Energy Example Problem 13:52 Kepler’s Three Laws 14:17 Kepler’s First Law 16:19 Kepler’s Second Law 16:42 Deriving Kepler’s Third Law Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Next Video: AP Physics C: Simple Harmonic Motion Review (Mechanics) Previous Video: AP Physics C: Rotational vs. Linear Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan, Sawdog, and Frank Geshwind for being my Quality Control team for this video. AP Physics C: Universal Gravitation Review (Mechanics)

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Name: AP Physics C: Dynamics Review (Mechanics) Category: Dynamics Date Added: 20170323 Submitter: Flipping Physics Calculus based review of Newton’s three laws, basic forces in dynamics such as the force of gravity, force normal, force of tension, force applied, force of friction, free body diagrams, translational equilibrium, the drag or resistive force and terminal velocity. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? Content Times: 0:18 Newton’s First Law 1:30 Newton’s Second Law 1:55 Newton’s Third Law 2:29 Force of Gravity 3:36 Force Normal 3:58 Force of Tension 4:24 Force Applied 4:33 Force of Friction 5:46 Static Friction 6:17 Kinetic Friction 6:33 The Coefficient of Friction 7:26 Free Body Diagrams 10:41 Translational equilibrium 11:41 Drag Force or Resistive Force 13:25 Terminal Velocity Next Video: AP Physics C: Work, Energy, and Power Review (Mechanics) Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Previous Video: AP Physics C: Kinematics Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan for being my Quality Control help. AP Physics C: Dynamics Review (Mechanics)

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So, an interferometer is the instrument used to measure gravitational waves. But, how do they do it? Well, the interferometer is an ingenious invention created by Albert Michelson back in the 1880s. The concept is actually quite simple too. The design starts with a concentrated laser beam, like any good invention. Next, the laser beam hits a beamsplitting mirror at a 45 degree angle. Thus, half the beam travels straight through the mirror, and the other half is deflected at a 90 degree angle. Each beam separately travels down several mile long corridors to hit a solid mirror, and bounce directly back. Once the beams again meet up at the beamsplitting mirror they collide in perfectly opposite tandem, crests meet troughs, and the two laser halves destroy each other. Wait... so then how does it measure a gravitational wave? Well, don't forget, these waves actually bend spacetime. And, they do it cyclically, with one direction stretching while the other shrinks, and then swapping. So, when they meet the interferometer, they actually elongate one of the corridors, while shrinking the other. This shifts the laser out of phase, and the two halves no longer cancel perfectly. Thus, the now undistorted laser recombines in the beamsplitting mirror and continue on to hit a photosensitive device. However, gravitational waves oscillate, so the end result actually comes up as a strobe light. Scientists then take this flashing light in as data with a computer, and transfer it into sound waves to be more easily understood. After all that work, one of the most powerful events in the universe is finally reduced to a small beep. It is exactly this beep which scientists at the Advanced LIGO observatory heard on September 14, 2015 at 5:51 am. Now, even more observatories are being put up all over the world in order to gain more accurate readings of these outlandish events. The soonest completed may be a new LIGO in India, and with this new observatory there will certainly be more gravitational wave sightings to come. With any luck, this outstanding discovery will lead to some excellent quantum mechanics and origin of the universe realizations.

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So, now that you know what gravitational waves are, where do they come from? Well, they are generated from some of the most energetic processes in the known universe. This includes supernovas (like the Big Bang), neutron star collisions, Black Hole mergers, etc. In actuality, gravitational waves can occur any time masses accelerate in nonsymmetrical motion. However, the only detectible sources are the ones listed above. Even these events are often incredibly difficult to detect, since the waves diminish to near unnoticeable levels by the time they reach Earth (thank goodness too, remember that head and arms thing from the last post? uugh). Though, gravitational waves themselves can actually have amplitudes larger than the universe. Gravitational waves were first proposed by Albert Einstein in 1916 as part of his theory of relativity. So, I guess it only took us a century to match his intellect, high five! Anyway, they also refute one of Newton's assertions in the Newtonian theory of gravitation, since Newton postulated that physical interactions propagate at infinite speeds. In reality, gravitational waves only travel at the speed of light, which isn't even as fast as some kids drive to school in the morning. But, what's really interesting about gravitational waves is that they actually tell a lot about the events from which they occurred. For example, the waves first detected were from the merging of two black holes. With multiple interferometers  the instruments used to measure gravitational waves  you can even triangulate the position the waves originated from. Scientists are currently hoping to use information gleaned from the study of gravitational waves in order to gain insight into the Big Bang and the ever elusive dark matter. Though, like i mentioned earlier, they're incredibly small by the time they reach Earth. So minute in fact, that Einstein thought that humanity would never be able to measure one. Einstein: 1, U.S.: 1. Thankfully, we have a really cool instrument for measuring them. Check in for part 3 to get the full scoop!

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There's been a good deal of hype surrounding gravitational waves recently. It's been all over the news, and has something to do with Einstein as far as we know. Wondering what it all means? Well wonder no more, I'm here to deliver the abridged version of what you need to know! For dummies. So, what is a gravitational wave? Well, it's a wave that propagates through spacetime itself. Remember how space and time are actually one thing, like a quilt over the universe? Well, gravitational waves travel along that plane, stretching and shrinking space itself. And, it acts upon spacetime in perpendicular directions, kind of like an electromagnetic wave. In short, it's a transverse wave (think of a sine wave) that acts in two different directions, the horizontal and the vertical. Now, that may still be confusing, so imagine this. You're standing at the end of a long square hallway with lights all along it. A gravitational wave starts at the other end, traveling toward you, and means business. As it approaches you, you would see the walls and ceiling of the hallway bending in and then puffing out rhythmically. As the walls puff out like they're being pushed in the center, the ceiling and floor get sucked in towards the center of the cross sectional hallway like someone pulled in the middle. Then, the two pairs of sides switch, and the ceiling/floor puffs out while the walls get sucked in. It travels closer and closer towards you, pushing and pulling in time, until it reaches you. At this point it crushes your arms into your torso, rips your head and legs off, then switches and stuffs the top and bottom back on like a hastily saved muffin and pulls your fingers off. Rude. But, that doesn't mean gravitational waves aren't cool! Check out part two for some more indepth understanding now that you know what gravitational waves look and feel like!

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Name: Gravity Waves Detected  The New York Times Category: Circular Motion & Gravity Date Added: 20160314 Submitter: FizziksGuy http://www.nytimes.com/2016/02/12/science/ligogravitationalwavesblackholeseinstein.html?_r=0 Gravity Waves Detected  The New York Times

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Name: Physics "Magic Trick" on an Incline Category: Dynamics Date Added: 20160606 Submitter: Flipping Physics Understand the forces acting on an object on an incline by analyzing the forces on a “floating block”. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:28 Finding the incline angle 1:17 Drawing the Free Body Diagram 2:26 Summing the forces in the perpendicular direction 3:49 Summing the forces in the parallel direction 5:04 Determining masses for the “Magic Trick” 6:11 Adding pulleys, strings and mass 7:34 Floating the block 8:18 Analyzing the forces on the floating block Next Video: Introductory Static Friction on an Incline Problem Multilingual? Please help translate Flipping Physics videos! Previous Video: Breaking the Force of Gravity into its Components on an Incline Thanks to Nic3_one and Cyril Laurier for their Fire Sounds: Fire in a can! » constant spray fire 1 by Nic3_one Earth+Wind+Fire+Water » Fire.wav by Cyril Laurier 1¢/minute Physics "Magic Trick" on an Incline

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Name: Breaking the Force of Gravity into its Components on an Incline Category: Dynamics Date Added: 20151016 Submitter: Flipping Physics Resolve the force of gravity into its parallel and perpendicular components so you can sum the forces. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:12 Drawing the Free Body Diagram 1:04 Introducing the parallel and perpendicular directions 2:19 Drawing the components of the force of gravity 2:49 Finding the angle used to resolve the force of gravity into its components 4:33 Solving for the force of gravity parallel 5:15 Solving for the force of gravity perpendicular 5:53 Redrawing the Free Body Diagram Next Video: Physics "Magic Trick" on an Incline Multilingual? Please help translate Flipping Physics videos! Previous Video: Determining the Static Coefficient of Friction between Tires and Snow 1¢/minute Breaking the Force of Gravity into its Components on an Incline

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Name: Newton's Laws of Motion in Space: Force, Mass, and Acceleration Category: Dynamics Date Added: 20151007 Submitter: FizziksGuy Uploaded on Apr 18, 2010ESA Science  Newton In Space (Part 2): Newton's Second Law of Motion  Force, Mass And Acceleration. Newton's laws of motion are three physical laws that form the basis for classical mechanics. They have been expressed in several different ways over nearly three centuries.  Please subscribe to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceMagazine • http://www.youtube.com/FFreeThinker  The laws describe the relationship between the forces acting on a body and the motion of that body. They were first compiled by Sir Isaac Newton in his work "Philosophiæ Naturalis Principia Mathematica", first published on July 5, 1687. Newton used them to explain and investigate the motion of many physical objects and systems. For example, in the third volume of the text, Newton showed that these laws of motion, combined with his law of universal gravitation, explained Kepler's laws of planetary motion.  Newton's Second Law of Motion: A body will accelerate with acceleration proportional to the force and inversely proportional to the mass. Observed from an inertial reference frame, the net force on a particle is equal to the time rate of change of its linear momentum: F = d(mv)/dt. Since by definition the mass of a particle is constant, this law is often stated as, "Force equals mass times acceleration (F = ma): the net force on an object is equal to the mass of the object multiplied by its acceleration." History of the second law Newton's Latin wording for the second law is: "Lex II: Mutationem motus proportionalem esse vi motrici impressae, et fieri secundum lineam rectam qua vis illa imprimitur." This was translated quite closely in Motte's 1729 translation as: "LAW II: The alteration of motion is ever proportional to the motive force impress'd; and is made in the direction of the right line in which that force is impress'd." According to modern ideas of how Newton was using his terminology, this is understood, in modern terms, as an equivalent of: "The change of momentum of a body is proportional to the impulse impressed on the body, and happens along the straight line on which that impulse is impressed." Motte's 1729 translation of Newton's Latin continued with Newton's commentary on the second law of motion, reading: "If a force generates a motion, a double force will generate double the motion, a triple force triple the motion, whether that force be impressed altogether and at once, or gradually and successively. And this motion (being always directed the same way with the generating force), if the body moved before, is added to or subtracted from the former motion, according as they directly conspire with or are directly contrary to each other; or obliquely joined, when they are oblique, so as to produce a new motion compounded from the determination of both." The sense or senses in which Newton used his terminology, and how he understood the second law and intended it to be understood, have been extensively discussed by historians of science, along with the relations between Newton's formulation and modern formulations. Newton's Laws of Motion in Space: Force, Mass, and Acceleration

Video Discussion: Dynamics Review for AP Physics 1
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Name: Dynamics Review for AP Physics 1 Category: Exam Prep Date Added: 09 March 2015  09:36 AM Submitter: Flipping Physics Short Description: None Provided Review of all of the Dynamics topics covered in the AP Physics 1 curriculum. Content Times: 0:18 Inertial Mass vs. Gravitational Mass 1:14 Newtonâ€™s First Law of Motion 2:20 Newtonâ€™s Second Law of Motion 3:17 Free Body Diagrams 4:29 Force of Gravity or Weight 4:41 Force Normal 5:32 Force of Friction 7:32 Newtonâ€™s Third Law of Motion 8:20 Inclines 9:41 Translational Equilibrium Multilingual? View Video 
Name: The Reality of our First Free Body Diagram Category: Dynamics Date Added: 19 November 2014  02:55 PM Submitter: Flipping Physics Short Description: None Provided The free body diagram we first learn is not entirely accurate. All of the forces are not drawn from the center of mass of the object. Learn why we start this way and, when we get torque, what the free body diagrams will actually look like. Content Times: 0:12 Reviewing the first free body diagram 0:39 A more correct free body diagram 1:22 Comparing this approach to the projectile motion approach 1:52 When we get to torque 2:42 The green screen Multilingual? View Video

Name: Weight and Mass are Not the Same Category: Dynamics Date Added: 10 November 2014  10:20 AM Submitter: Flipping Physics Short Description: None Provided Three major differences between weight and mass are discussed and three media examples of weight in kilograms are presented (and you should know that weight is NOT in kilograms). Content Times: 0:18 Base SI dimensions for weight and mass 1:25 NASA: weight in kilograms 1:38 Michio Kaku: weight in kilograms 1:52 Derek Muller of Veritasium: weight in kilograms 2:30 Weight is a vector and mass is a scalar 2:53 Weight is extrinsic and mass is intrinsic 3:52 Comparing weight and mass on the Earth and the moon 4:45 Space elevators Multilingual? View Video

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Name: Introduction to the Force of Gravity and Gravitational Mass Category: Dynamics Date Added: 05 November 2014  09:47 AM Submitter: Flipping Physics Short Description: None Provided Defining the Force of Gravity or Weight and Gravitational Mass. We also determine the dimensions for force in both Metric and English units. Content Times: 0:11 Defining the Force of Gravity or Weight 1:09 Defining Gravitational Mass 2:12 The direction of the Force of Gravity 2:47 Determining the dimensions for force 4:09 The English unit for force 4:54 Slug vs. Blob Multilingual? View Video

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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 freefall 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

What? Gravity is weak? Then how am I not floating right now? This has to be a joke. It's not. Gravity is one of the four fundamental forces in our universe. The others are electromagnetic, strong nuclear, and weak nuclear forces. Gravity is the oddball in this group. It is also preventing the completion of the unification equation. While the other forces, besides EM, have relatively short ranges, gravity does not. Gravity has infinite range, and has a bigger effect over range than other forces. Gravity is pulling the Milky Way and Andromeda galaxies together at this very moment. Gravity pulls everything together due to its range and the size of the objects being moved, but it pales in strength to the other forces. When put on the same scale as all the other forces, the force of gravity is an afterthought. At the same levels, EM forces are magnitudes stronger than gravity. Strong and weak nuclear forces affect individual particles much more than gravity does. For example, the magnitude of EM force between two hydrogen molecules is an undecillion times stronger than gravity. Why? Science hasn't really given a definitive answer, but we do know that the universe as we know it wouldn't exist without this weak force, because neither would we.

Have you ever wondered why you always come down when you jump up? It's because of gravity a force that is always present on Earth. Gravity is what pulls you back down after you jump up. It's the reason why a basketball travels in a parabola when you shoot it. It is taking effect on the entire flight of the ball, like the incline. It's just the normal force pushing upwards against the force of gravity, but eventually once the ball reaches 0 m/s the ball starts to accelerate back down at a rate of 9.81 m/s^2. You can really tell gravity has worked right when it hits the apex, because that's when the opposing forces have equaled out! Sadly,Gravity will always have the same amount of force as long as we are on Earth... but if you go to a place like the Moon gravity is roughly 1/6 as strong as it is on Earth so you jump, or pass, or shoot a basketball a lot farther!

Everyone likes trampolines. But how do they even work? It's all about energy, and at the same time, proves Newton's laws of motion. Potential energy (PE) and kinetic energy (KE) are the reason trampolines allow you to jump higher than you can on flat ground. One type of potential energy that is involved with trampolines is the potential energy stored in springs. Another type of energy is gravitational potential energy. There is also kinetic energy because you are moving. The equation that connects potential and kinetic energy to find total energy (E) is: E=PE+KE+Q The total energy of the person jumping on a trampoline equals all of the potential energy (both the spring and gravitational potential), plus the kinetic energy. Q is internal energy, which isn't really important here. Other equations needed to understand the forces and energy of trampolines are: PE=mgh This used to find the potential energy due to gravity. You multiply the mass of the object (or person in this case), by the height they are from the ground, by g, acceleration due to gravity. Which is always 9.81 m/s^2. People with larger masses have a greater potential energy due to gravity if they are at the same height as someone with a smaller mass. However, it is harder for people with larger masses to reach the same heights as people with small masses, because gravity is pulling them down more. PE=(1/2)kx^2 The potential energy stored in a spring: "x" is how much the spring stretches, and "k" is the spring constant. Hooke's law goes along with this: F=kx. The force of the spring is the constant multiplied by the change in the spring length. This demonstrates Newton's third law; every action has an equal and opposite reaction. When the springs are stretched by the person, they have to compress again, making the person jump higher as the trampoline returns to its original position. Because of gravity, larger masses allow the spring to be stretched out more. This can be shown by the equation F=ma, which is Newton's second law of motion. "F" is the force of gravity, "m" is mass, and "a" here is also g, acceleration due to gravity. So when mass increases, so does the force of gravity. This means the object/person is being pulled down harder by gravity. This stretches the springs of the trampoline more, creating a higher spring potential energy. But the mass is usually too heavy for the spring to move you if you just stand there, which is why you don't move unless you start jumping first. Smaller kids usually jump higher than adults, even though they have a lower potential energy due to gravity, because the trampoline can more easily spring them back up, since they are being pulled down by gravity slightly less. This is all a great example of Newton's first law: objects in motion will keep moving, and objects at rest will not move, until acted upon by an outside force. The outside forces that keep you on the trampoline are both gravity, which keeps you down, and the trampoline itself, which keeps you up. You also wont move until you begin jumping. Pushing your feet down makes you go up. (Newton's third law!)
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