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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.
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this is wrong. It is not a kitchen lubricant but rather "cereal varnish" his company makes to keep milk from entering cereal. requires a very easy and quick google search to get the proper information. facepalm
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NEW FILE: SimuLAB: Motion in a Circle
FizziksGuy replied to FizziksGuy's topic in Honors and Regents Physics
Hi Terry -- based on popular request of instructors I don't give out the solutions to the lab, leaving it to instructors to formulate their solutions (otherwise it becomes a much less effective tool for classroom teachers as students could just copy the answers).- 2 replies
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- uniform circular motion
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NEW FILE: SimuLAB: Motion in a Circle
TerryBrantley replied to FizziksGuy's topic in Honors and Regents Physics
Where can i find the solution to this lab?- 2 replies
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- uniform circular motion
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Hector started following FizziksGuy
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That's an initial velocity from a jump. Usain Bolt is looking at his whole body running where 12.27 m/s is a sustained speed.
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Sense check. Usain Bolt max speed is 12.27m/s. How is Jordan able to obtain horizontal velocity around 25m/s??? http://www.planet-science.com/categories/over-11s/human-body/2012/06/how-fast-is-usain-bolt.aspx
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I'm not following you, Fizziks. None of the graphed values (k∆x vs. Msinθ) are theoretical. k - must be calculated somehow, based on measurements of force, displacement, and/or the like ∆x - measured M - measured θ - measured sinθ - calculated What theoretical values are you referring to?
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Right, but it's ultimately a proof of 1 vs. 1, not an empirical derivation of g. You're proving something is itself if you use theoretical values.
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Graphing k∆x vs. Msinθ would result in a slope of g. Not a slope of 1. But since k must have been calculated, the wording of the rubric makes it sound like this solution wouldn't count.
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Graphing the empirical k_delta_x vs. Msintheta would work, but not the theoretical. They want you to determine an empirical value for g, not do a mathematical exercise that results in a 1=1 proof.
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A very interesting question, OP. Color me flummoxed.
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I'm looking at the AP Mech C practice FRQ: https://apclassroom.collegeboard.org/29/question_bank/create/preview/item/1320757 On part c, the scoring rubric says "1 point is earned for [graphing] a pair of quantities that could be used to determine g - students must graph measured, not calculated quantities." Does this mean that graphing k∆x vs. Msinθ would not earn the point? If so, that would deviate from past AP Exams, would it not?
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Potential Energy, Kinetic Energy and Cats
kailyn1239 commented on prettybird's blog entry in My Journey in Physics
i wanted to know if a frightened cat was kinetic or potential energy, not what your cat did for 7 minutes -
Oh, so you keep all the values positive. Thanks!
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See here:
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AngeFlight started following Physics 1 2nd edition Q 5.39 CARTS
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Everyone in my household has tried working this problem and cannot come up with the given answer. A force F acts on a cart in motion on a frictionless surface to change its velocity. The initial velocity of the cart and final velocity of each cart are shown. You do not know how far or in which direction the cart traveled. Rank the energy required to change each cart's velocity from greatest to least. Cart A changes from 5 m/s to 2 m/s and has a mass of 2 kg. Cart B changes from 3 m/s to -3 m/s and has a mass of 3 kg. Cart C changes from 5 m/s to 6 m/s and has a mass of 5
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Gaurav Kakran started following Fundamentals of LaTeX for High School Students
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so cool!
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Simple Harmonic Oscillator - Critically Damped
FizziksGuy replied to Muskkan's topic in AP Physics 1/2
I might start with a resource like this: https://opentextbc.ca/physicstestbook2/chapter/damped-harmonic-motion/ or this: https://www.toppr.com/guides/physics/oscillations/damped-simple-harmonic-motion/ -
Muskkan started following Simple Harmonic Oscillator - Critically Damped
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Well, in AP Physics class we are using Giancoli 6th edition book. It doesn't have equations for Damped simple harmonic oscillator. I looked at the following link: http://farside.ph.utexas.edu/teaching/336k/lectures/node19.html but I do not know how to get started. The given are Amplitude = .05 m, Time = 3.5 sec, Mass = .58kgs, k = 150 N/m and we nee to find Friction force.
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Simple Harmonic Oscillator - Critically Damped
FizziksGuy replied to Muskkan's topic in AP Physics 1/2
Hi Muskkan. Damped oscillators are outside the scope of AP Physics 1/2, but happy to help if I can. How far have you gotten so far / where are you getting stuck? -
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?
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how do I find an article on this
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