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This 2 page Study Guide was uploaded by Usman Qureshi on Wednesday November 18, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 14 views.
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Date Created: 11/18/15
3Sit anywhere at tables 18 but arrange yourselves in groups of 3 for today s experiment 3 Last Lecture 3Force as a vector 3Static equilibrium Xi 0 3Addition and subtraction on vectors 3Today 3Examples examples examples 3Experiment 1 Static equilibrium 3 Important Concepts 3Force is a vector both magnitude and direction matter 3Vectors Think with arrows calculate with components 3Problem Solving Tool Setting up 3Make a careful drawing 3Think carefully about all of the forces 3Chose an axis put it on your drawing 3Think carefully about the angles 3Problem Solving Tool Component checklist 3Loop through vectors 3ls there a component 3ls there an angle factor 3ls it sine or cosine 3ls it positive or negative F1 F2 F3 Does it move Basic idea behind components 3Want to do a quantitative calculation with vectors 3 Need to convert multidimensional object to numbers add or subtract or multiply the numbers and then generate the multidimensional answer 3Write each vector as a sum of smaller subvectors all of which point in the same direction Think with arrows Calculate with components X version 1 Calculate with components version 1 Y 1 Given C G and 90 G V Find AB B 11 Given A C G Find B 1 C 111 Given A B C Y Find 6 i quot EFX A 0050 Bsin 0 X EFy Asin0Bcos C 0 Summary 3 Different ways of writing vectors are related by Fx 2 F c0s0 F sin F F sin6 F c0s y F F F lFx Fy tan9 Fx Fy G F F tang 7 3Unit vector notation FF mm or FF iAF x y x 7 Summary 3 Practice the component checklist and the guidelines for setting up static equilibrium problems Don t try to remember special cases each problem is different 3The units of force are Newtons 3 Force of gravity on an object of mass M near the surface of the Earth is Mg where g 9811g 3Some forces for example the normal force will rarely be given but instead will usually be found using sums of forces Experiment Advice 3Make sure that the Force sensor is plugged into the 750 interface the interface is plugged into the USB on the side of the monitor and that the interface is turned on 30ne member of the group should log onto the computer to download the LabVIEW program to run the experiment 3Don t forget to use a section of L10 and decide around your table who will be groups A B and C Experiment Advice 3Try to be as careful as possible about your measurements of the two distances 3Check regularly that the weight hanger is in the middle of the string It tends to move away from the center as you loosen the string 3 Notice that there are questions on both sides of the answer sheet 3Each group should list all names on a single answer sheet turned in at the end
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