1. Block A has a mass of 5kg and is accelerating downward at 2 m/s². What is the force at the free end of the cable F₁? Neglect friction and mass of the pulleys and cable. F₁ = ? stationary mA = 5 kg aд = 2 m/s² A
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- 17. Compute the acceleration of body B and the tension in the cord attached to it. 40o lb 300 lb f=0.20 B 400 lb 300 lb f,=0.20 3 FIG. P-1060.8. A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley may be considered frictionless. The coeffi- cient of static friction between the block and the plane is us; and the coefficient of kinetic friction is k 0 A. g D. g - Hk sin(0) m a. What is the magnitude of the static frictional force acting on the block? B.m g [1 - sin(0)] C. mg D. mg cos(0) B. g - Hk cos(0) A. m g sin(0) E. mg [1 - cos(0)] b. If the rope were cut between the block and the pulley, what would be the magnitude of the acceleration of the block down the plane? C. g [sin(0) - μ cos(0)] sin(0)] c. If the mass of the suspended object is doubled, what will be the acceleration of the block up the plane? B. g [2 tan(0) - uk sin(0)] D. 2g [μ sin(0) - cos(0)] m E. g [tan (0) A. g [2 - μk sin(0)] C. g [2 cos(0) - μ sin(0)] E. g [2 sin(0) Hk Cos (0)]. -6. A box is on a ramp inclined at 25° to the horizontal. The coefficient of static friction is .30, and of kinetic friction .20. 1²=30 pe Me=20m a. The box slides down the ramp. b. The box stays on the ramp without slipping. c. The box first slips, but then stays fixed after slowing down. d. We need the mass of the box to answer the question. 3250 www th mg OL M = mg COSTS
- A block of mass m sits at rest on a rough inclined ramp that makes an angle with the horizontal. What must be true about normal force F on the block due to the ramp? OA. F= mg cos9 OB. F>mg OC.F>mg sin OD. F> mg cos OE. F=mg sinA taut string connects a crate with mass ?1=5.00 kgM1=5.00 kg to a crate with mass ?2=12.0 kg.M2=12.0 kg. The coefficient of static friction ?s,1μs,1 between the smaller crate and the floor is 0.567;0.567; the coefficient of static friction ?s,2μs,2 between the larger crate and the floor is 0.443.0.443. What is the minimum magnitude of force ?minFmin required to start the crates in motion?1 V:IV H.W.docx H.W: Two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between m, (5kg) and the table is 0.20. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the acceleration, a, of the system, which will have the same magnitude for both boxes assuming the cord doesn't stretch, As m (2Kg) move down, m,move to the right. m. د قوة الشد Tو تسارع النظام .a علما بأن البكرة مهملة الكتلة والاحتكاك؟ 出 1
- 1 V:IV H.W.docx H.W: Two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between m, (5kg) and the table is 0.20. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the acceleration, a, of the system, which will have the same magnitude for both boxes assuming the cord doesn't stretch. As m; (2Kg) move down, m, move to the right. m. د قوة الشد Tو تسارع النظام .a علما بأن البكرة مهملة الكتلة والاحتكاك؟ 出 l20 Son la 1Two masses are attached with a string passing over a frictionless pulley. mA has mass of 5 kg. mB has mass of 2.5 kg. The coefficient of friction between mA and table is 0.35. 1. What's the weight of mA? 2. Weight of mB? 3.What's the force of friction between mA and the table?left end. What is the tension in the right hand side wire?(g "s2) 4. A 120 kg scaffold is 5.60 m long. It is hanging with two wires, one from each end. A 460 kg box sits 2.20 m from th Newtons f60 sf60 ssic 60 ssf60
- 6. A 100 kg scaffold is 6.60 m long. It is hanging with two wires, one from each end. A 440 kg box sits 1.50 m from the left end. What is the tension in the left hand side wire?(g = 9.8 m/s?) NewtonsO B. 61 N OC 440 N O D.16 N O E. 599 N QUESTION 9 An elevator suspended by a vertical cable is moving downward but slowing down. The magnitude of tension in the cable must be O A. greater than the magnitude of the weight of the elevator. OB. less than than the magnitude of the weight of the elevator. OC. equal to the magnitude of the weight of the elevator. O D. None of the above QUESTION 10 An object moves with a constant speed of 428 m/s on a circular track of radius 21 m. What is the magnitude of the acceleration of Note: For fill in blank, I have set the unit for the answer. So, you just need to provide a number - Please write your numerical a cientific notation. If you are not sure about the number of significant figures, you can keep the number of figures as many as pos ais.) Save and Submit to save and submit. Click Save All Answers to save all answers. pe here to search Co 立I have a shelf full of textbookd.Each book has a mass of 1.0 kg and mus=0.3. a. How hard do I need to push horizontally to unstick the top book from the rest of the pile? b. How many books can I unstick from the top of the pile if I push with a force of 16N?