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Name: AP Physics C: Work, Energy, and Power Review (Mechanics) Category: Work Energy & Power Date Added: 20170330 Submitter: Flipping Physics Calculus based review of work done by constant and nonconstant forces, Hooke’s Law, Work and Energy equations in isolated and nonisolated systems, kinetic energy, gravitational potential energy, elastic potential energy, conservative vs. nonconservative forces, conservation of mechanical energy, power, neutral, stable, and unstable equilibrium. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? Content Times: 0:11 Work done by a constant force 2:25 Work done by a nonconstant force 3:58 Force of a Spring (Hooke’s Law) 4:52 Calculating the work done by the force of a spring 6:26 Net work equals change in kinetic energy 7:02 Gravitational Potential Energy 7:50 Nonisolated systems work and energy 8:29 Isolated systems work and energy 9:02 Conservative vs. Nonconservative forces 10:10 Conservation of Mechanical Energy 10:45 Power 12:09 Every derivative can be an integral 13:00 Conservative forces and potential energy 13:46 Deriving Hooke’s Law from elastic potential energy 14:22 Deriving the force of gravity from gravitational potential energy 15:17 Neutral, stable, and unstable equilibrium Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Next Video: AP Physics C: Integrals in Kinematics Review (Mechanics) Previous Video: AP Physics C: Dynamics Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan for being my Quality Control help. AP Physics C: Work, Energy, and Power Review (Mechanics)

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 nonisolated system
 conservative force
 nonconservative force
 conservation of energy
 power

Name: WorkEnergy Theorem Problem by Billy Category: Work, Energy, Power Date Added: 20160518 Submitter: Flipping Physics Learn with Billy as he uses the WorkEnergy Theorem or what I prefer to call the Net WorkKinetic Energy Theorem to solve a problem. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:36 The problem statement 1:02 The Net WorkKinetic Energy Theorem 2:03 The Net Work on the Horizontal Surface 3:39 The Net Work on the Incline 4:05 The Work done by the Force of Gravity 5:40 The Work done by the Force of Kinetic Friction 7:24 Substituting back into the Net Work equation 9:31 Positive vs. Negative Work 10:56 A generally overview of what happens to all the energies 11:57 Energy percentages Need help understanding theta 1? Next Video: Introduction to Power Multilingual? Please help translate Flipping Physics videos! Previous Video: Deriving the WorkEnergy Theorem using Calculus 1¢/minute WorkEnergy Theorem Problem by Billy

Name: Deriving the WorkEnergy Theorem using Calculus Category: Work, Energy, Power Date Added: 20160226 Submitter: Flipping Physics Use the integral and derivative to derive the WorkEnergy Theorem or what I prefer to call the Net WorkKinetic Energy Theorem. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:21 The integral definition of work 1:02 Net Work 1:53 Substituting in for acceleration 2:40 Dealing with dv/dt 3:26 Changing the limits 3:50 Substituting in velocity 4:32 Taking the integral 4:56 Kinetic Energy! 5:16 The Theorem 5:42 Other energy equations 6:46 When can we use this equation? Next Video: WorkEnergy Theorem Problem by Billy Multilingual? Please help translate Flipping Physics videos! Previous Video: Work due to Friction equals Change in Mechanical Energy Problem by Billy 1¢/minute Deriving the WorkEnergy Theorem using Calculus

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Name: Work due to Friction equals Change in Mechanical Energy Problem by Billy Category: Work, Energy, Power Date Added: 20160217 Submitter: Flipping Physics Enjoy learning from Billy as he solves a problem using Work due to Friction equals Change in Mechanical Energy. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:21 The problem 0:51 Work due to Friction equals Change in Mechanical Energy 1:31 Determining the Mechanical Energies 2:44 Solving for the Force Normal 3:52 Relating height final to displacement along the incline 5:03 Substituting in numbers Next Video: Deriving the WorkEnergy Theorem using Calculus See this problem solved using Conservation of Energy and Newton’s Second Law. Multilingual? Please help translate Flipping Physics videos! Previous Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem 1¢/minute Work due to Friction equals Change in Mechanical Energy Problem by Billy

Name: Introductory Work due to Friction equals Change in Mechanical Energy Problem Category: Work, Energy, Power Date Added: 20160212 Submitter: Flipping Physics The equation Work due to Friction equals Change in Mechanical Energy can often be confusing for students. This video is a stepbystep introduction in how to use the formula to solve a problem. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:09 The problem 1:29 Why we can use this equation in this problem 1:52 Expanding the equation 2:29 Identifying Initial and Final Points and the Horizontal Zero Line 3:00 Substituting into the left hand side of the equation 4:05 Deciding which Mechanical Energies are present 4:59 Where did all that Kinetic Energy go? 5:27 Identifying which variables we know and do not know 5:58 Solving for the Force Normal 6:57 Substituting Force Normal back into the original equation 8:09 Why isn’t our answer negative? Next Video: Work due to Friction equals Change in Mechanical Energy Problem by Billy Multilingual? Please help translate Flipping Physics videos! Previous Video: Introduction to Mechanical Energy with Friction 1¢/minute Introductory Work due to Friction equals Change in Mechanical Energy Problem

Name: Introduction to Mechanical Energy with Friction Category: Work, Energy, Power Date Added: 20160208 Submitter: Flipping Physics Learn how to use Mechanical Energy when the Work done by Friction does not equal zero. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:09 When is Conservation of Mechanical energy true? 0:37 Work due to Friction equals the Change in Mechanical Energy 1:57 Determining the angle in the work equation 3:01 When the angle is not 180 degrees 3:50 What if the work done by friction is zero? 4:31 Always identify … Next Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem Multilingual? Please help translate Flipping Physics videos! Previous Video: The Energy Song by Bo 1¢/minute Introduction to Mechanical Energy with Friction

Name: The Energy Song by Bo Category: Work, Energy, Power Date Added: 20160129 Submitter: Flipping Physics Sing and learn about Work and Mechanical Energy with Bo! Want Lyrics? This is an AP Physics 1 topic. Multilingual? Please help translate Flipping Physics videos! Next Video: Introduction to Mechanical Energy with Friction Previous Video: Conservation of Energy Problem with Friction, an Incline and a Spring by Billy Hear "The Energy Song" on Soundcloud. 1¢/minute The Energy Song by Bo

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Name: Work due to the Force of Gravity on an Incline by Billy Category: Work, Energy, Power Date Added: 20160115 Submitter: Flipping Physics Billy does an example problem to review the work equation. Want Lecture Notes? This is an AP Physics 1 topic. This video expands on what we did in “Conservation of Energy Problem with Friction, an Incline and a Spring by Billy”. Please make sure you watch that video first. Content Times: 0:26 The problem 1:11 The level surface 1:29 The incline 2:21 The values Next Video: The Energy Song by Bo Multilingual? Please help translate Flipping Physics videos! 1¢/minute Work due to the Force of Gravity on an Incline by Billy

Name: Introductory Work Problem Category: Work, Energy, Power Date Added: 20151119 Submitter: Flipping Physics Mr.p pushes a shopping cart so you can learn about the physics concept of work! Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:09 Reading and translating the problem 0:52 Demonstrating the problem 1:30 Better Off Dead 2:04 Drawing the Free Body Diagram 3:14 Solving for work with two common mistakes 4:45 Work done by the Force of Gravity 5:16 Work done by the Force Normal Next Video: Introduction to Kinetic Energy with Example Problem Multilingual? Please help translate Flipping Physics videos! Previous Video: Introduction to Work with Examples 1¢/minute Introductory Work Problem

Everybody loves a good hero. But, are they realistic? Some of our favorite crusaders  Batman, Link, Green Arrow  use grappling hooks to get around. I wonder if they’d work like in the games and movies. Let’s say Batman is trying to get into Arkham Asylum to teach some no goodnicks what he thinks of this whole “rehabilitation” thing. He needs to get two floors up, which is about 6.6 m. And, like in the movies, he needs to rocket up that distance, let’s say at about 6 m/s. The average man weighs 70 kg, but Batman is pretty buff, so we’ll make it 75 kg. We can calculate the work needed to be (.5)mv^2 + mgh, which here equals 6205.95 J. We also know v = d/t, so that means t = d/v = 1.1 s. And, power = W/t = 5641.77 W. It’s pretty safe to say a handheld motor like the ones we see in the media couldn’t make over 5.5 kW of pull. A mounted artillery grappling gun could, and are used by the US special forces for stealth missions. However, until our technology evolves a bit more, Batman will just have to learn to actually fly.

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Name: Introduction to Work with Examples Category: Work, Energy, Power Date Added: 20151113 Submitter: Flipping Physics An introduction to the physics equation for work, including a few basic examples of positive vs. negative work. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:07 The Work Equation 0:45 Physics work is not what you normally think of as work 2:07 Example #1 2:46 Example #2 3:35 Example #3 4:10 Example #4 5:05 Joules, J, the units for work 5:43 Work is a Scalar 6:28 Better Off Dead Next Video: Introductory Work Problem Want to see this video being made? Multilingual? Please help translate Flipping Physics videos! Previous Video: Physics “Magic Trick” on an Incline 1¢/minute Introduction to Work with Examples

Name: Work, Energy and Power Review for AP Physics 1 Category: Exam Prep Date Added: 13 March 2015  08:25 AM Submitter: Flipping Physics Short Description: None Provided Review of the topics of Work, Energy, Power and Hookeâ€™s Law covered in the AP Physics 1 curriculum. Content Times: 0:18 Work 1:38 Kinetic Energy 2:13 Elastic Potential Energy 3:02 Gravitational Potential Energy 4:02 Work and Energy are in Joules 4:58 Conservation of Mechanical Energy 5:54 Work due to Friction equals the Change in Mechanical Energy 6:46 Power 7:46 Hookeâ€™s Law Multilingual? View Video

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Listen to this. lets talk about work. Work is not only equal to force times distance, but is also equivalent to the change in kinetic energy. For instance, if a car of mass m is traveling 10 m/s and comes to a stop in 15 m, its very easy to find the work. Work=Change in Ke=((1/2)m(10)^2) ((1/2)m(0)^2)=50m This means that the breaks in this car must do 50m j of work to stop the car.

Hello! I'm using the "AP Physics Essentials: 1" book to study for my Work, Power, and Energy exam (chapter 5.) I need clarification on question 5.10; how do we decide on the equation to use? I'm so lost on how to make that determination. Thanks!

Yesterday I climbed Giant Mountain, one of the 46 Adirondack High Peaks. With a summit elevation of 4,627 feet (1,410 m) Giant is the 12th tallest of the high peaks and with an elevation change of 3000 ft in 3 miles it's also on of the steepest. The journey began at the car near the trail head where I was deciding on footwear. The 2 options were hiking boots (0.92 kg a pair) of Nike frees (.42 kg a pair). The boots would be heavier and require more work to ascend the mountain, but would provide better traction and keep my feet dry. The frees would require less energy but likely slip on everything, provide less support and get my feet drenched within minutes. I chose the boots, so how much more work did I do climbing the mountain? The ideal approach to figuring this out would be to multiply the number of steps that I took while ascending and descending the mountain by the average distance that I lifted my feet with each step; and then multiply that by the force I exerted against the weight of my boots/shoes (work=force*displacement). However I didn't count my steps because counting for 5 hours would have driven me insane and the vertical distance that I lifted my feet varried widely on the diffenrt sorts of terain I encountered. So I'll just use the vertical displacement up the mountain as my displacement. The difference im energy expendature can be found by multiplying the difference in weight of the shoes by the displacement up the mountain. Difference in weight=(.92kg.42kg)(9.8m/s2)=4.9N Vertical displacement=(3000ft)(1mi/5280ft)(1609m/mi)=914m work=force*displacement Difference in work=(4.9N)(914m)=4497.6J So by choosing the boots I expended about an extra 4500 Joules (about 1070 calories) of energy (but I estimate that in reality It was probably closer to double that). However as we climbed further the trail became covered in snow and ice, making it incredibly wet and slippery, so without the boots I likely would have fallen off the the mountain and gotten frostbite on my feet. In the end think 4500J is a fair tradeoff for not dying.
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