PHY 161 Online Lab #9 - Springs

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Apr 3, 2024

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PHY111, 161 ON-LINE LAB, Springs Lab #9 and 10 (counts as two) NAME: Zackary Pond Working with Springs NAU User ID: 6206307 Download and save this document to your computer. Answer the questions directly on this document. When you are done, SAVE the file and return it to your TA via BB Learn. Please contact your TA with any questions or other issues. Introduction: Hooke's law states that the force (F) which is required to stretch or compress a spring by a given distance (x) , increases or decreases linearly with respect to that distance. F Spring = -kx where k is a constant which is characteristic of the spring, and x is the distance stretched and which is relatively small compared to any possible deformation of the spring might suffer. Hooke’s Law is named after 17th-century British physicist Robert Hooke. Task #1 Go to the PhET simulation at: https://phet.colorado.edu/en/simulation/hookes-law Click on the Intro Icon Take some time to familiarize yourself with how the controls work and the variables that you can change. 1
PHY111, 161 ON-LINE LAB, Springs Procedure: Check all the boxes in the gray box to the upper right. 1. Try a variety of applied forces to pull the spring. What do you notice about the resulting spring force ? In your own words explain why this result makes sense. 2. Set the applied force to +50 N. Now change the spring constant , trying out several different values. What happens to the applied force ? What happens to the spring force ? Explain why this result makes sense. 3. Now, watch what happens to the displacement vector as you change the spring constant . Using Hooke’s Law explain the results. 2
PHY111, 161 ON-LINE LAB, Springs 4. Now click on the icon with two springs. This will allow you to compare and contrast two springs with different spring constants and/or applied forces . Set both systems so that they are identical. With the same applied force and the same spring constants, like the image below. (you may choose different values) The first, or top spring system, will act as your standard and you’ll make changes to the bottom system. Make only one change at a time. Make comparisons (like: “it doubles”, “it triples”, “it stays constant”, etc.) and record your data in the table below. CHANGES YOU MAKE Effect on the displacement vector Double the original spring constant It halves Triple the original spring constant Its a third of the original Half the original spring constant It doubles Double the original applied force It doubles Triple the original applied force Its triple 3
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Part B Consider the force exerted by a spring that obeys Hooke's law. Find U (xt) – U(xo) = SF ds. where Fs = -ka i, ds = dæ i, and the spring constant k is positive. Express your answer in terms of k, xo, and xf. >View Available Hint(s) a AX中 ? U(xf)– U(xo) = Submit P Pearson ation Inc. All rights reserved. | Terms of Use | Privacy Policy Permissions | Contact Us | 99+ 6:56 ENG 3/20/2 F8 prt sc home F9 end insert delete F10 F11 F12 &
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mail.google.co X Lehman Collec x The Division o X Lehman Collec X Lehman Collec X Office of the R X P Course Home session.masteringphysics.com/myct/itemView?assignmentProblemID=135511028&offset=Dnext Apps (1) RÝPE.. YouTube to MP3 Co... phone cover for mo... AGARWAL-PHY-166
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1. Given the illustration on the right, compute the work done by the following: a. Tension b. Frictional force 650 ft 1.0 kN
mail.google.co x E Lehman Collec X The Division of X Lehman Colleg x Lehman ColleC X Office of the R X P Course Home X session.masteringphysics.com/myct/itemView?assignmentProblemID=135511058&offset3Dnext Apps (1) ইমাম মাহদী কবে... *. YouTube to MP3 Co... phone cover for mo... AGARWAL-PHY-166 N5 m 2 Part A How much work did the movers do (horizontally) pushing a 49.0-kg crate 10.3 m across a rough floor without acceleration, if the effective coefficient of friction was 0 50? Express your answer using two significant figures. HA Value Units य Submit Request Answer rovide Feedback
Problem #4 Given: The following experimental results Required: Calculate the spring constant in MPa-m. Convert the spring constant to lbf/in.
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