AP Physics 1/2

Hello, I think the solution for the part b has some problem. To calculate the new center of mass, the boy's new position should not be 4.24m as shown in the solution. While the boy walks across the raft, the raft is also moving. The other corner already shift towards the left. I believe the final position of the boy relative to the raft's center should be (x + 2.12) m. Using this in the CM calculation, x = -0.424 m. So the raft moved 2.544m in the direction opposite the boys's displacement. Thanks for your attention.

How come the displacement of the ball won’t be 4m?

1) For 5.20, why’s c a correct answer? 2) Can someone please explain the answer for 5.33? I got 1, but the book says 3 is the correct answer.

In the following diagram, a force F acts on a cart in motion on a frictionless surface. The initial and final velocities of each cart are shown. Rank the energy required to change each cart's velocity from greatest to least. A: Weighs 2 kg, 5 m/s to 2 m/s - Change in KE = 1/2*2*(2*2-5*5) J = -21 J B: Weighs 3 kg, 3 m/s to -3 m/s - Change in KE = 1/2*3*(3*3-(-3)*(-3)) J = 0 J C: Weighs 5 kg, 5 m/s to 6 m/s - Change in KE = 1/2*5*(6*6-5*5) J = 27.5 J D: Weighs 4 kg, -1 m/s to 2 m/s - Change in KE = 1/2*4*(2*2-(-1)*(-1)) J = 6 J The answer says that the ranking is C, B, A, D, which doesn't make any sense to me given the calculations I made. Can someo…

Can someone answer this: A critically damped simple harmonic oscillator starts from an amplitude of 5.0 cm and comes to rest at equilibrium 3.5 sec later. The simple harmonic oscillator is made of a .58 kg mass hanging from a spring with spring constant 150 N/m. Assuming the friction force is in the vertical direction, how big is the friction force?

I am trying to understand the answer to this question. If a negatively charged rod is brought near the knob at the top of the electroscope then the electrons in the electroscope will be pushed to the end with the leaves (the knob will assume a net positive charge). If the aim is to finish with a positively charged electroscope then a grounding wire / finger would have to be applied near the leaf end of the electroscope to give the excess electrons a path to earth. The given answer does not specify which part of the electroscope is grounded, but since only the knob is accessible, the rest being in the glass bulb, the implication is that the knob is grounded. It…

I am confused about problem number seven part b in this pdf. http://aplusphysics.com/ap1/Problems/AP1 Momentum.pdf I read the given answer, and I am still confused. I don't know how you are supposed to get 0 m/s for the velocity of the block. Why do you use negative impulse for the block when you use positive impulse for the sphere? When do you use negative impulse? Why don't you use the mass of the entire system, which would be the block and the ball? This has to do with it being elastic/inelastic, but I don't know how you can tell from an impulse graph. Help??

On problem 19(c) of the supplemental questions for AP1 Dynamics I must be doing something wrong with the Trig functions to solve for the tension in each wire, but the problem is not worked out in the answer, it simply says to substitute the appropriate trig functions to solve. Can someone show me the steps for that so I achieve the correct answer? Thanks! AP1 Dynamics 19.pdf

Name: AP Physics 1 2017 Free Response Solutions Category: Exam Prep Date Added: 2017-08-20 Submitter: FizziksGuy Walk-through of the 2017 AP Physics 1 Free Response Questions. Questions can be found at https://secure-media.collegeboard.org...For more information, please visit http://aplusphysics.com*AP and Advanced Placement Program are registered trademarks of the College Board, which does not sponsor or endorse this work. AP Physics 1 2017 Free Response Solutions

Name: AP Physics 2 2017 Free Response Solutions Category: Exam Prep Date Added: 2017-08-20 Submitter: FizziksGuy Walk-through of the 2017 AP Physics 2 Free Response Questions. Questions can be found at https://apcentral.collegeboard.org/pd....For more information, please visit http://aplusphysics.com.Looking for help in AP Physics 2? Check out my course guidebook, AP Physics 2 Essentials: An APlusPhysics Guide! http://amzn.to/2vPMA0H*AP and Advanced Placement Program are registered trademarks of the College Board, which does not sponsor or endorse this work. AP Physics 2 2017 Free Response Solutions

Does anyone know when the AP Physics 2 Videos are going to be completed?

A 0.15-kilogram baseball moving at 20 m/s is stopped by a catcher in 0.010 seconds. The average force stopping the ball is: (A) 3.0x10^-2 N (B) 3.0X10^0 N (C) 3.0X10^1 N (D) 3.0X10^2 N The explanation says that it takes 0.010 seconds for the baseball to accelerate from 0 m/s to 20 m/s, but that doesn't really match up with the question... Is the wording a little weird?

Name: AP Physics 2 2016 Free Response Solutions Category: Exam Prep Date Added: 2016-05-15 Submitter: FizziksGuy Walk-through of the 2016 AP Physics 2 Free Response Questions. Questions can be found at http://apcentral.collegeboard.com/apc/members/exam/exam_information/225439.html. *AP and Advanced Placement Program are registered trademarks of the College Board, which does not sponsor or endorse this work. AP Physics 2 2016 Free Response Solutions

Name: AP Physics 1 2016 FRQ Solutions Category: Exam Prep Date Added: 2016-05-08 Submitter: FizziksGuy Walk-through of the 2016 AP Physics 1 Free Response Questions. Questions can be found at http://apcentral.collegeboard.com/apc/members/exam/exam_information/225288.html. *AP and Advanced Placement Program are registered trademarks of the College Board, which does not sponsor or endorse this work. AP Physics 1 2016 FRQ Solutions

Name: Reflections on the 2015 AP Physics 1 Exam Free Response Questions Category: Exam Prep Date Added: 2016-04-17 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:29 Write Legibly 0:44 Graphs are answers 1:00 lowercase vs. UPPERCASE variables 1:16 Free Body Diagrams 1:48 Algebra 2:00 Terms you need to be familiar with 3:21 Weight and mass are not the same 3:32 Design an experiment 3:45 Paragraph-length response 3:54 Compare variables AP Physics 1 Review Videos Previous Video: Free Response Question #5 - AP Physics 1 - 2015 Exam Solutions Multilingual? Please help translate Flipping Physics videos! 1¢/minute…

Name: Free Response Question #5 - AP Physics 1 - 2015 Exam Solutions Category: Exam Prep Date Added: 2016-04-17 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:09 The initial setup 1:54 Part (a) 3:02 Part (b) 4:22 Part (c) AP Physics 1 Review Videos Next Video: Reflections on the 2015 AP Physics 1 Exam Free Response Questions Previous Video: Free Response Question #4 - AP Physics 1 - 2015 Exam Solutions Multilingual? Please help translate Flipping Physics videos! 1¢/minute AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product. …

Name: Free Response Question #4 - AP Physics 1 - 2015 Exam Solutions Category: Exam Prep Date Added: 2016-04-07 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:10 The initial setup 1:07 Part (a) 2:19 Part (b) 3:06 Part (c) AP Physics 1 Review Videos Next Video: Free Response Question #5 - AP Physics 1 - 2015 Exam Solutions Previous Video: Free Response Question #3 - AP Physics 1 - 2015 Exam Solutions Multilingual? Please help translate Flipping Physics videos! 1¢/minute: http://www.flippingphysics.com/give.html AP® is a registered trademark of the College Board, which was not involved in the production of, an…

Name: Free Response Question #3 - AP Physics 1 - 2015 Exam Solutions Category: Exam Prep Date Added: 2016-03-31 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:11 The initial setup 1:00 Part (a) setup 2:11 Part (a) at x = -D 3:07 Part (a) from x = -D to x = 0 4:28 Part (a) from x = 0 to x = 3D 6:39 Part (b) 7:21 Part (b i) 7:50 Part (b ii) 8:33 Part (c) 10:14 Part (d) Question 11:12 Part (d) Answers AP Physics 1 Review Videos Next Video: Free Response Question #4 - AP Physics 1 - 2015 Exam Solutions Previous Video: Free Response Question #2 - AP Physics 1 - 2015 Exam Solutions Multilingual? Please help tr…

Name: Free Response Question #2 - AP Physics 1 - 2015 Exam Solutions Category: Exam Prep Date Added: 2016-03-30 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:15 The initial setup 0:55 The initial circuit diagram 1:37 Part (a) 3:24 Part (b i) 3:55 Part (b ii) 4:26 Part (c i) 5:23 Part (c ii) 5:49 Part (d) AP Physics 1 Review Videos Next Video: Free Response Question #3 - AP Physics 1 - 2015 Exam Solutions Previous Video: Free Response Question #1 - AP Physics 1 - 2015 Exam Solutions Multilingual? Please help translate Flipping Physics videos! 1¢/minute AP® is a registered trademark of the College Boa…

Name: Free Response Question #1 - AP Physics 1 - 2015 Exam Solutions Category: Exam Prep Date Added: 2016-03-25 Submitter: Flipping Physics Want Lecture Notes? Content Times: 0:11 The initial setup 0:29 Part (a) 1:52 Advice about Free Body Diagrams (or Force Diagrams) 2:47 Part (b) 4:37 Part (c) 6:34 A shorter answer to Part (c) Next Video: Free Response Question #2 - AP Physics 1 - 2015 Exam Solutions AP Physics 1 Review Videos Multilingual? Please help translate Flipping Physics videos! 1¢/minute AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this produc…

Rotational Motion Packet View File Click "Download" to access the Rotational Motion completed packet. Submitter mpowlin Submitted 12/17/2015 Category Rotational Motion

Name: Introduction to Kinetic Energy with Example Problem Category: Work Energy & Power Date Added: 2015-11-19 Submitter: FizziksGuy Published on Nov 18, 2015 Mr.p rides a bike and drives a car to help you learn about Kinetic Energy. Want Lecture Notes? http://www.flippingphysics.com/intro-ke.html This is an AP Physics 1 topic. Content Times: 0:05 Defining Kinetic Energy 0:36 Joules, the units for Kinetic Energy 1:27 Can Kinetic Energy be negative? 1:54 Defining the example problem 3:01 A common mistake 3:35 Actually solving the problem 4:57 Visualizing the answer Multilingual? Please help translate Flipping Physics videos! http://www.flipping…

Name: AP Physics 1 - Angular Momentum Category: Rotational Motion Date Added: 2015-11-19 Submitter: FizziksGuy Brief introduction to angular momentum for algebra-based physics courses such as AP Physics 1. AP Physics 1 - Angular Momentum

Conservation of Energy AP Problems View File Click "Download" to access the completed Conservation of Energy AP Problems. Submitter mpowlin Submitted 11/17/2015 Category WEP

Energy and Momentum Packet View File Click "Download" to access the completed Energy and Momentum Packet. Submitter mpowlin Submitted 11/17/2015 Category WEP