All Activityhttps://aplusphysics.com/community/index.php?/discover/APlusPhysics Community - All ActivityenNEW FILE: SimuLAB: Motion in a CircleHi 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).Thu, 01 Oct 2020 12:26:19 +0000NEW FILE: SimuLAB: Motion in a CircleWhere can i find the solution to this lab?Sun, 27 Sep 2020 23:11:15 +0000How Micheal Jordan Jumps so highThat'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.Wed, 29 Apr 2020 21:08:50 +0000How Micheal Jordan Jumps so highSense 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.aspxWed, 29 Apr 2020 10:19:24 +0000A deviation in scoring protocol?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?Mon, 27 Apr 2020 14:46:53 +0000A deviation in scoring protocol?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.Mon, 27 Apr 2020 13:38:55 +0000A deviation in scoring protocol?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.Mon, 27 Apr 2020 12:36:21 +0000A deviation in scoring protocol?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.Thu, 23 Apr 2020 21:25:12 +0000A deviation in scoring protocol?A very interesting question, OP. Color me flummoxed.Thu, 23 Apr 2020 17:32:54 +0000A deviation in scoring protocol?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?Wed, 22 Apr 2020 17:56:03 +0000Potential Energy, Kinetic Energy and Catsi wanted to know if a frightened cat was kinetic or potential energy, not what your cat did for 7 minutesSun, 19 Apr 2020 00:18:51 +00005.39 QOh, so you keep all the values positive. Thanks!Wed, 15 Apr 2020 14:21:20 +0000Physics 1 2nd edition Q 5.39 CARTSSee here:Wed, 15 Apr 2020 11:42:55 +0000Physics 1 2nd edition Q 5.39 CARTSEveryone 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 kg.
Cart D changes from -1 to 2 m/s and has a mass of 4 kg.
Does this problem use W = 1/2 mv^2 formula? Does mass matter since it's frictionless and is moving in the x direction?Tue, 14 Apr 2020 16:39:36 +0000The Physics of Flipping Cats!so cool!Wed, 04 Mar 2020 13:23:55 +0000Simple Harmonic Oscillator - Critically DampedI 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/Thu, 20 Feb 2020 00:00:38 +0000Simple Harmonic Oscillator - Critically DampedWell, 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.Tue, 18 Feb 2020 21:46:04 +0000Simple Harmonic Oscillator - Critically DampedHi 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?Tue, 18 Feb 2020 21:04:02 +0000Simple Harmonic Oscillator - Critically DampedCan 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?Tue, 18 Feb 2020 19:34:05 +0000Volleyball through physicshow do I find an article on thisMon, 10 Feb 2020 20:36:46 +0000Physics of BadmintonBadminton is a Sport where players score points by striking a shuttlecock with their racket so that it passes over the net and lands in their opponent's half of the court. It involves various aspects of physics, such as aerodynamics, projectile motion, kinetic/potential energy etc..Tue, 17 Dec 2019 22:32:39 +0000The Physics of TetrisTetris Gems Super Combo 547,156 New World Record!!!
https://www.youtube.com/watch?v=R01-9wYwht8Tue, 10 Dec 2019 06:40:16 +0000Dynamics-FrictionThe one about the ice skater? Can you be more specific?Sat, 30 Nov 2019 17:30:27 +0000Dynamics-FrictionI don't understand the context of the 5th question of the Dynamics- Friction worksheetFri, 29 Nov 2019 21:15:25 +0000