Please do 7. And show explanation . Thank you 3. Holding a third cord in your ha
ID: 1323878 • Letter: P
Question
Please do 7. And show explanation . Thank you 3. Holding a third cord in your hand, find the direction in which a third force should act in order to balance the system. Set the cord on a pulley in the proper position and add weights to the holder until the system is in static equilibrium, as shown in figure 3.2. It may be necessary to adjust the position of the weight holder to achieve equilibrium. 4. Record masses, angles and forces in the data sheet labeled Trial 1. 5. Repeat step 1 through 4 using a 45 degree angle between the two loads. Record your results in the data sheet labeled Trial 2. 6. Set up four pulleys and suspend unequal loads on the cords running over them. Arrange the system so that it is in equilibrium, and record the masses and angles. Do not have any two cords form an angle of 180degree. Record your results in the data sheet labeled Trial 3. 6. Suppose you pace a mass m = 300g, at phi = 210 mark. Compute the masses ma and mb you would place at 0degree and 90 degree to balance mass m. try it and see if your solution is correct. Report what masses you had to place at 0degree and 90degree to balance the mass at 210degree.Explanation / Answer
m = 300 g = 0.300 kg
Thus,
W = mg = 2.94 N
As t = 210 degrees, then
Wx = Wcost = -2.546 N
Wxy = Wsint = -1.47 N
Thus, the weight at t = 0 should cancel Wx,
W(0 degrees) = 2.546 N --> m = 0.2598 kg = 259.8 g [ANSWER, weight at 0 degrees]
Also, the weight at 90 degrees must cancel Wy,
W(90 degrees) = 1.47 N --> m(90 degrees) = 0.15 kg = 150 g [ANSWER, weight at 90 degrees]