\fPHY2048 Adding Forces Lab : Adding Two-Dimensional Forces-Statics The objective of this exercise is to determine the force necessary to put an object in equilibrium. This will be done mathematically and then tested experimentally. The object to be kept in equilibrium is a small ring at the center of a force table, as seen at right. Your instructor will show you how to properly set up the pulleys and weights on the force table. Clamp 3 pulleys on the force table at: 0 and hang a total mass of 100 g (including the hanger) . 450 and hang a total mass of 150 g . 120 and hang a total mass of 200 g Calculate the weight in Newtons for each mass (use g =9.80 m/s2 for this exercise). Remember the weight in Newtons is FG = mg F1 = 0.98 ( 3 CM 1. ) = 2, 94 Cm F2 = 1 147 - IN) ( 3 (MYN ) = 4.41 cm F 3 = 1 . 96 - IN) ( 3 Cry/N ) = 5.88 cm F = ma 10.29 cm N- foos ( fg ) : my 3 cm FN INPHY2048 Adding Forces Part 1: Graphical method 1 . On a separate sheet of paper, draw a force diagram using the forces provided above. Use a scale. For example, use 3 cm for each Newton. 2. At this point determine your coordinate system to add your force vectors graphically. 3. Enter the value of the Fnet and the direction O in degrees you get from the graphical method. Fnetgraph = (N) O = 4. Determine the force that would cause equilibrium when combined with the original forces would have a magnitude equal to Fnetgraph, but be directed in the opposite direction. Thus, you would have to add 180 to the angle direction calculated for Fnet. Record the magnitude and direction of this equilibrium force . This force is called the equilibrant force and will be labeled as Fequilgraph. Fequilgraph = (N) Ograph = , 120 0 1450 200gg 150 0 1009 Include calculations in lab 3 2