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Unformatted text preview: Sonia Rahangdale- PHY 231 Fall 2006 1 Set 03 (09/19 midnight) Due date: Tue Sep 19 23:59:00 2006 Two forces F 1 and F 2 are acting on a mass M=4.0 kg. The force F 1 = 11.0 i + 5.0 j + 1.0 k , in N. The acceleration of the mass is given by a = 1.0 i + 3.0 j + 2.0 k , in m/s 2 . Calculate the magnitude of F 2 . You are correct. Your receipt is 155-2023 A 39.7 kg boy and a 59.2 kg girl are on the surface of a frozen lake, 11.0 m apart. Using a rope, the boy exerts a horizontal 5.95 N force on the girl, pulling her toward him. Calculate the magnitude of the boy’s acceleration. You are correct. Your receipt is 155-2023 A 5.86 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=10.4 N at an angle θ = 21.0 ◦ above the horizontal, as shown. θ Μ F What is the speed of the block 3.10 seconds after it starts moving? You are correct. Your receipt is 155-2027 Two blocks are in contact on a frictionless table. A horizontal force F is applied to M 2 , as shown. If M 1 = 1.30 kg, M 2 = 3.32 kg, and F = 6.00 N, find the size of the contact force between the two blocks. M 2 M 1 F You are correct. Your receipt is 155-2535 If instead an equal but oppositely directed force is applied to M 1 rather than M 2 , find the size of the contact force between the two blocks. You are correct. Your receipt is 155-2877 Two masses, m 1 = 1.59 kg and m 2 = 8.10 kg are on a hor- izontal frictionless surface and they are connected together with a rope as shown in the figure. F m m 1 2 The rope will snap if the tension in it exceeds 55.0 N. What is the maximum value of the force F which can be applied? You are correct. Your receipt is 155-2581 What is the acceleration of the whole system, when this max- imum force is applied? You are correct. Your receipt is 155-2149 A long uniform board weighs 58.4 N (11.7 lbs) rests on a support at its mid point. Two children weighing 425.0 N (85.0 lbs) and 311.0 N (62.2 lbs) stand on the board so that the board is balanced. What is the upward force exerted on the board by the support? You are correct. Your receipt is 155-2007 A crate is pulled up using frictionless pulleys in the manner shown in the figure. The angle is θ = 43.0 ◦ . The masses are, for the small pulley, m 1 = 3.9 kg, for the traveling pulley, M 2 = 6.9 kg, and for the crate, M C = 40.2 kg. What is the minimum tension with which the operator must pull on the cable (assume the cable is of neglible mass) in order to slowly raise the crate.is of neglible mass) in order to slowly raise the crate....
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