e plate B has the mass mg. Neglect the mass of the roj se the coefficients of kinetic friction indicated in the figu Draw the free-body diagrams of the block A and the instant shown. Write the equations of motion, ΣF = mả, for the block not solve the equations!)
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- In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (250+X) mm while the bottom arms are (300+X) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position Note X is the student roll no. for example if the student roll no is A20 then X=20The figure shows a spool and a vertical force of P = 250 N is applied to the cable. Determine the following: a) The acceleration of G, b) The angular acceleration of the spóol, and c) The Friction force. where the coefficients of static and kinetic friction between the 400mm of 200mm rail and the spool are u, = 0.25 and u = 0.2, respectively. The mass of the spool is 150 kg. The radius of gyration of the spool is kg = 250 mm (about its center of mass G). The Friction force (N) = Choose... + The acceleration of G (m/s2) = %3D Choose... + The angular acceleration of the spool (rad/s2): Choose...pls answer fast thank you A system of blocks is shown in the figure. Assume the pulley is frictionless *show FBD 1. Which of the following most nearly gives the least value of P required to prevent the system of blocks from sliding to the left? 2. Which of the following most nearly gives the least value of P required to cause the system of blocks to have impending motion to the right? 3. Which of the following most nearly gives the reaction at the pulley if the system of blocks is to have an impending motion to the right?
- In the figure, masses A and B are connected to each other by a rope. Two masses that were initially motionless are free after they are released, they take action. Acceleration of mass A if the inclined plane is considered frictionless which of the following? B/ 2mi 5m A 30° please choose one: a.(4/7) g b.(5/7) g c.mg/3 d.g/7 e.g/53. In the diagram below, a force P of 750 N is applied to the 350 kg block. Find the acceleration of the block and the reaction forces at contact points A and B if the coefficient of kinetic friction between the block and surface is 0.15. 700 mm 700 mm 300 mm 300 mm 400 mm 500 mm'500 mm3- (KINETICS) The coefficient of friction under each of the weights shown in Fig. is 0,1. Solve of the acceleration of the weights and the tension T in the rope. Neglect the friction and weight of the pulley. 1000 N 1000 N 30 60 Act
- 3- (KINETICS) The coefficient of friction under each of the weights shown in Fig. is 0,1. Solve of the acceleration of the weights and the tension T in the rope. Neglect the friction and weight of the pulley. 1000 N 1000 N 60 30P1) Three blocks of masses m, = 8 kg, m, = 4 kg and ma = 3 kg are tied to each other as shown in the figure. The coefficient of kinetic friction between the 4 kg block and the surface is 0.5. When the system is released the blocks move. Calculate the acceleration of the blocks and the tensions in the strings.In Fig. 5-14, the two boxes have identical masses of 40 kg. Both experience a sliding friction force with u 0.15. Find the acceleration of the boxes and the tension in the tie cord. 08T 30 30 0.Sme Fig. 5-14 Note: Draw the free-body diagram for objects A and B.
- 6. The m kg crate shown in Figure 6 is hoisted up by the incline using the cable and motor M. For a short time, the force in the cable is F = Kt? newton where t is in seconds. If the crate has an initial velocity vị a. Draw the free body diagram of the problem. 2 m/s when t = 0s, b. Determine the velocity when t = 2 s. The 8. coefficient of kinetic friction between the crate K = 596 15 and the incline is µk = 0.3. .kg Figure 6. 140 m =8. Block A of mass m is moving down along the vertical, curved, rough path (kinetic coefficient of friction = uk). The attached Spring restricts the motion and, due to the roller guide, always remains horizontal as the block descends. Draw the FBD and the kinetic diagram separately using rectangular and n-t coordinate system and indicate the appropriate coordinates in both diagrams. Present your work in the template provided on figure. X t HilB r P F A UBC Engineering Your team is prototyping a simple braking system for your model car. The 3.4 kg wheel with a radius of r = rad 0.15 m is rotating at w = 18 - .A servo motor can apply a variable force F, which in its first two seconds of operation is equal to F = 10t N and afterwards is equivalent to a constant force of F = 20 N . If the coefficient of kinetic friction between the braking arm and the wheel is μ= 0.2, determine the time needed for the wheel to come to a full stop. The point of contact P between the wheel and the arm is a distance r = -0.2 + 0.26 ĵ m from point A. The force of the servo motor is applied at exactly half of the horizontal distance to A from the point of contact. Assume the wheel can be treated as a disk and that the braking arm is massless. t =