The slope of your graph should be the average rise ever run or force per distance stretched. This value is the value you should show on your graphs equation and you should use this value to determine the unknown masses, Credit will not be given for those masses ifyou do not show an equation on your graph. Credit will also not he git-en if you just divide your forces by your elongations for each trial. and then average the three spring constants Your equation on your Excel graph should look like this: F = ;__Z Nun) x I 11E "i is your slope! This is also your spring constant. k. Determine the two unknown masses. lthinl: they are red and blue in the simulation. Use Hooke's Law to determine the masses. Show all data and calculations. Remember you will now be using the known spring constant. kand determining the unknown masses instead of usmg the known masses and determining the spring constant which is what you just did. You can do this by using Hooke's Law agaut: he; The force on the spring is again equal to the weight of the unknown mass: which is equal to mass* g, so... = T mg = 5;; 111 = REE Show units in your work. You should be able to give a value for the uni-{normi red and blue masses now which is the other primary purpose of the lab. Determine the spring constant and then use Hooke's Law to determine the unknown masses. s: pm I. c? c, :. IMr re) Styles Paragraph . 1. . 1 . . . 1 . . . 2 . . .6 . ..'' Co Force (N) 1 0 0.1 0.2 0.3 0.4 Extension (m) A graph must have the following properties to be given full credit. 1) The graph itself and the axis must be titled, with units given. 2) Major and minor gridlines should be shown. 3) The equation of best fit should be shown with physics symbols and units with any values (not the equation y=mxtb) Here is an example of an acceptable graph Time2 vs meff 1.6 14 12 1 I 1 0 . 8 0.6 0.4 0.2 0.02 0.04 0.06 0.08 0.1 0.12 man (kg) T - (12.554sec) /kg]m + 0.0564sec Search a WHere is some help with the chapter 5 lab: The primary objective is for you determine the spring constant and then determine the mass of the unknown masses. The following simulation will be used: http:/phet.colorado.edu/simulations/sims.php?sim=Masses and Springs Use the option on the right that says Lab Determine the spring constant, &, of Spring 1, by using Hooke's Law. Do not change the value of the spring constant but just leave it as it is because I am grading you based on the how accurately you can determine the spring constant. For this first part you will have to use at least three known masses of objects that are hung from the spring. You can see a little slider where you can change the mass on the spring. By applying lots of friction, which is a setting on the right, you will be able to get your mass to hang still. Remember that right now you don't know the spring constant and you are trying to determine that value. You can see that there is a little slider on the right that can change the spring constant, but it does not show the value of the spring constant. Don't move this slider around once you start on this part because the spring constant is supposed to be a constant. Show a table of your data. Then take those values, convert the masses to kilograms and then convert the mass in kilograms to the weight of the masses. Remember that weight = m*g. Then graph Force(weight) vs. length of spring. Your graph should look something like this: Search 99+ a O O W O hp