The 25-lb slender rod has a length of 6 ft. Using a collar of negligible mass, its end A is confined to move along the smooth circular bar of radius 3y2 ft. End B rests on the floor, for which the coefficient of kinetic friction is uB = 0.28. The bar is released from rest when 0 = 30°. (Figure 1) %3D
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- The 544g collar is free to slide on the smooth rod OA. The rod rotates about pin O at constant angular velocity, é. a =en + še, = a = RÔ?e, + RÖe, for a circular path, R = radius 2.1 Use N-T coordinates, draw a FBD and a kinetic diagram to determine the minimum value of é for which the collar will maintain contact with the stop at A throughout the rotation. 2.2 Would friction between the collar and the rod affect your result in 2.1?Fial I The figure shows a body consist of two segments which are a rod AB and a disk with weights of 4-lb and 11-lb respectively. The body is attched with a spring. The roller 1 ft k = 8 lb/ft Datum at C allows the spring to remain vertical as the rod falls. B A The length of the unstretched spring is 0.85 ft. If the body is released from rest and rotates CW about point B, 1 ft 3 ft determine the following: (Assume the datum at point B) 0.25 ft 1. The potential energy of the spring when the body is horizontal. 2. The potential energy due to gravity when the body is horizontal. 3. The potential energy of the spring when the body is vertical. 4. The potential energy due to gravity when the body is vertical. 5. The angular velocity at the instant the body becomes vertical.The 10 kg slender bar AB, shown in the figure, has a length of 2 m. A blockof negligible mass, pinned freely to end A, is confined to move along the smooth circular groove with its centre at O. End B rests on the floor for which the coefficient of kinetic friction, µk = 0.4. If the bar is released from rest when θ = 30 degrees a) draw the free body, kinematic and kinetic diagrams for the bar, b) set up a global reference axes system, and write down the relevantkinetic and kinematic relationships with respect to reference axes system, c) determine the angular acceleration of the bar and the reaction forces at ends A and B. *****MASS IS 10KGS NOT 10LBS*****
- The circular bar shown in the figure is vertical.fixed by the support at point A in the plane. AThe spring constant connected to the support is k = 40 N/m. Broadcastingundeformed length, arc between circle ABis the distance. C fitting (bracelet) with a mass of 200 grams,connected to the spring and move in a frictionless circle bar.can. When the union is θ = 30° from the rest positionis being released. In this case, relative to point B of the fittingthe highest height it can reach and the highestcalculate the speedThe torsional spring has a stiffness of 20 N-m/rad and is undeflected when the 3-kg uniform slender bar is in an upright position. If the bar is released from rest in the horizontal position shown, find its angular velocity as it passes the vertical position. Neglect friction effects. 4 Type here to search ThinkVision K - Pan Tab Cape Look Esc Q A Z G FT W S # ONDA 3 F2 E D A $ 4 R F 5 F4 T G XCVB 8 a Y H N P6 F6 U J M F7 K ( F8 F10 F11 +Backspace Enter T F12 Shift Print Screen SysRq Insert 0.5 m Scroll Lock Delete Home Break End Page Up Page Down Naam Lock K 37°F Cloudy Home Lenovo B 20A uniform slender bar AB with a mass of 20 kg and length of 3.6 m leans on a wall as shown. It is attached to a weightless small roller at end A on a smooth horizontal surface. The coefficient kinetic friction between end B and the wall is 0.25. If the bar is released from rest in the position shown when θ is 30°. Then find, determine the normal force at A. determine the normal force at B. determine the frictional force between end B and the wall.
- xed axis) students in my Mechanisms class have created a doohickey consisting of a bar with uniform thickness and width, total mass of mABC = 30 kg, and lengths LAB = 4 m and LBC = 2 m. The angle shown is 0 = 30°. It's connected to cylinder E (mɛ = 20 kg) by an inextensible, massless cable which passes over frictionless, massless pulley. It is released from rest. Determine: a) the acceleration of the cylinder b) the tension in the cable c) the reactions ON the pin at B LAB B LBC C D EThe 10 kg slender bar AB, shown in the figure, has a length of 2 m. A blockof negligible mass, pinned freely to end A, is confined to move along the smooth circular groove with its centre at O. End B rests on the floor for which the coefficient of kinetic friction, µk = 0.4. If the bar is released from rest when θ = 30 degressDraw the free body, kinematic and kinetic diagrams for the bar.*********MASS IS 10 KG, NOT LBS********** The 10 kg slender bar AB, shown in the figure, has a length of 2 m. A blockof negligible mass, pinned freely to end A, is confined to move along the smooth circular groove with its centre at O. End B rests on the floor for which the coefficient of kinetic friction, µk = 0.4. If the bar is released from rest when θ = 30 degrees *********MASS IS 10 KG, NOT LBS********** a)draw the free body, kinematic and kinetic diagrams for the bar, b) set up a global reference axes system, and write down the relevantkinetic and kinematic relationships with respect to reference axes system, and c) determine the angular acceleration of the bar and the reaction forces at ends A and B. *********MASS IS 10 KG, NOT LBS**********
- Your answer is partially correct. The figure shows the cross section of a uniform 174-lb ventilator door hinged about its upper horizontal edge at O. The door is controlled by the spring-loaded cable which passes over the small pulley at A. The spring has a stiffness of 12.7 lb per foot of stretch and is undeformed when = 0. If the door is released from rest in the horizontal position, determine the maximum angular velocity reached by the door and the corresponding angle 0. Answer: Wmax = www 4.2' 0.636 rad/sec at 0 = 58.49 OIn 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=20in A force of P = 20 N is applied to the cable, which causes a 175 kg of radius of Gyration KG = 0.42m reel to turn without the 2 rollers A and B of each 18 kg and radius of 0.1m. P 40° 250 mm OG 500 mm -400 mm- Calculate the work done by the 20N for 2 revolutions. (J) B Calculate the Kinetic energy of roller A after the reel rotated 2 revolutions starting from rest. (J) Determine the angular velocity of the reel after it has rotated 2 revolutions starting from rest. (rad/s) Choose... Choose... Choose