Lab #1 : Using wires to reduce singular loads When a heavy object is suspended on a wire, it is usually connected to sev

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Lab 1 Using Wires To Reduce Singular Loads When A Heavy Object Is Suspended On A Wire It Is Usually Connected To Sev 1 (59.22 KiB) Viewed 77 times

Lab 1 Using Wires To Reduce Singular Loads When A Heavy Object Is Suspended On A Wire It Is Usually Connected To Sev 2 (32.15 KiB) Viewed 77 times

Lab #1 : Using wires to reduce singular loads When a heavy object is suspended on a wire, it is usually connected to several other wires. This reduces the stress at points of attachment. It can also be used to multiply force. See for example a block and tackle pulley. A street light is the most common example of this type of arrangement. The physics of hanging objects has been extensively investigated. Objective: The objective of today's experiment will be to test the validity of the equations for the physics of hanging objects. Approach: We will achieve this objective by suspending an object of known weight from two wires. By placing a strain gauges in line with one of the wires. This will allow a direct comparison between calculations and experimental measurement. Materials: A ring stand with crossbar three wires. 1 strain gauges, several weights 5 kg, 10kg, 15 kg (2)200g Procedure: [1] Set up ring stand per figure. [2] Measure distance between the two attachments on the cross bar. [3] Attach 500g of weight to hanging string. [4] Measure vertical distance from intersection of hanging weight to cross bar. [5] Measure distance from each attachment to the intersection of hanging weights. [6] Record the reading on the strain gauge. Exp T2 [7] Use the law of cosines and the law of sines knowing the two sides and O1, calculate 02. [8] Use 2 to Calculate the Tension stress in S2 line which will be T2. Results [11] Compare calc T2 with exp T2 reading by calculation of percent difference. Gauge reading Calculated reading % difference Data: T2
Sl: fixed at 65 cm S2:43 will get longer as the hanging mass gets larger Spring extension S12: Unnecessary Calculate 62 From measurements of S1 and S2 and Ꮎ1 . Calculate T2 and T3 using mass of hanging object. Conclusion: Is the physics of the hanging objects verified? Why? Does mass makes a difference in the readings? Why or why not. If I wanted to hang a 50 pound lamp but the ceiling supports could not support more than 25 pound how could I use multiple wires to do this? Data.SI = 65 cm, S2 = 43. mass=10 kg. Ty = 87 N, 0, – 30 degrees SI = 65 cm, S2 = 36.4 cm, mass = 15 kg, T,= 128 N, O, = 30 degrees S1 = 65 cm, S2 = 95 cm, mass = 5 kg, T= 62 NO, -27 degrees Figure 1. Experimental Setup Se e S2 T: T, S.