Hint* When dealing with more than 2 masses, it is often easier to treat the system...
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Hint* When dealing with more than 2 masses, it is often easier to treat the system as a whole rather than doing a FBD for each of the masses. initial velocity = 0 m/s T2 7.0 kg 5.0 kg 4.0 kg 8.0 kg to 1500 ml k 14 002 al p A a) Calculate the acceleration of the 7.0-kg block, if the coefficient of friction is 0.15 for both boxes. b) Calculate the magnitude of the tension T in the cable c) Calculate the magnitude of the tension T in the cable d) Calculate the magnitude of the tension T3 in the cable 2. Two boxes with masses 17 kg and 15 kg are connected by a light string that passes over a frictionless pulley of negligible mass as shown in the figure below. The surfaces of the planes are frictionless. 17 kg 15 kg 10312 45 60 When the blocks are released, which direction will the blocks move? bas At what rate will the masses accelerate? Scale Reading (newtons) 800 700 600- 500 400 300 200+ 100. 0 0 Time (s) 10 15 20 ? A student whose weight is 500 N stands on a scale in an elevator and records the scale reading as a function of time. The data are shown in the graph above. At time t = 0, the elevator is at displacement x = 0 with velocity v = 0. Assume that the positive directions for displacement, velocity, and acceleration are upward. Describe the motion of the elevator. In each of the five-second segments, indicate the direction of motion, and whether the elevator is increasing, decreasing, or constant. Justify by referring to the graph. t = 0 to t = 5: the t = 5 to t = 10: t = 10 to t = 15: t = 15 to t = 20: eldso si ni T panel apulinga od otiu 2=10 Hint* When dealing with more than 2 masses, it is often easier to treat the system as a whole rather than doing a FBD for each of the masses. initial velocity = 0 m/s T2 7.0 kg 5.0 kg 4.0 kg 8.0 kg to 1500 ml k 14 002 al p A a) Calculate the acceleration of the 7.0-kg block, if the coefficient of friction is 0.15 for both boxes. b) Calculate the magnitude of the tension T in the cable c) Calculate the magnitude of the tension T in the cable d) Calculate the magnitude of the tension T3 in the cable 2. Two boxes with masses 17 kg and 15 kg are connected by a light string that passes over a frictionless pulley of negligible mass as shown in the figure below. The surfaces of the planes are frictionless. 17 kg 15 kg 10312 45 60 When the blocks are released, which direction will the blocks move? bas At what rate will the masses accelerate? Scale Reading (newtons) 800 700 600- 500 400 300 200+ 100. 0 0 Time (s) 10 15 20 ? A student whose weight is 500 N stands on a scale in an elevator and records the scale reading as a function of time. The data are shown in the graph above. At time t = 0, the elevator is at displacement x = 0 with velocity v = 0. Assume that the positive directions for displacement, velocity, and acceleration are upward. Describe the motion of the elevator. In each of the five-second segments, indicate the direction of motion, and whether the elevator is increasing, decreasing, or constant. Justify by referring to the graph. t = 0 to t = 5: the t = 5 to t = 10: t = 10 to t = 15: t = 15 to t = 20: eldso si ni T panel apulinga od otiu 2=10
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