PHY11L Experiment 5 - h b Abstract. .

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b h Abstract.  This experiment deals mainly with the verification of Hooke’s law which states that   the extension of a spring is in direct proportion with the load applied to it. This experiment aims to   investigate the relationship between the deforming forces and the amount an object stretches and the   total work done on the spring when being stretched. In order to do that, two springs of different spring  constants were used and examined. Their elasticity and spring constant were determined by applying   varying   forces   to   it   by   means   of   tension   held   by   it.   For   every   change   in   force,   there   was   a  corresponding change in length. The plotted force vs. displacement graph produces a line where its   slope was obtained to be the spring constant, K of the spring. It is compared to the average spring  constant obtained using Hooke’s law. Afterwards, the work done on the spring is then obtained in two  methods which are by using the obtained formula and by getting the area produced by the line and   the x-axis. At the end, we proved that displacement is directly proportional to the force applied as well   as the spring constant of the spring is equal o the slop of the graph produced. Aside from that, the   area of the graph is in equivalent magnitude with the work done on pulling the spring. Introduction Automobile suspensions, playground toys and  even   retractable   ball-point   pens   employ  springs. Most springs have an easily predicted  behavior   when   a   force   is   applied.  Consequently, the force that a spring applies to  a   body,   as   the   spring   is   extended   or  compressed,   can   be   mathematically  determined. This type of relationship can be  described   by   a   number   of   mathematical  relationships. In this lab, one will see which  one describes the springs we are using. Robert Hooke, a contemporary of Newton, tried  to define a set of mathematical laws to predict  the   behavior   of   forces   directed   towards   the  center   of   something   ('central   forces',   e.g.  planetary gravity). He examined central forces  that were directly proportional to the distance  between two objects. This linear relationship  does   not   hold   true   in   light   of   our   present  knowledge of planetary gravitation, but works  well for springs.   Hooke's Law, as commonly  used, states that the force a spring exerts on a  body   is   directly   proportional   to   the  displacement of the system (extension of the  spring).  If a weight, W = mg, is hung from one end of an ordinary  spring, causing it to stretch a distance 
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This note was uploaded on 04/27/2011 for the course PHY 11L taught by Professor Agguire during the Spring '11 term at Mapúa Institute of Technology.

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PHY11L Experiment 5 - h b Abstract. .

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