The small slider A is moved along the circular slot by a mechanism attached to the back side of the rectangular plate. For the slider position
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- The 1200-lb homogeneous block is placed on rollers and pushed up the 10 incline at constant speed. Determine the force P and the roller reactions at A and B.arrow_forwardThe system consists of the two smooth spheres, each weighing 3 lb and connected by a light spring, and the two bars of negligible weight hinged freely at their ends and hanging in the vertical plane. The spheres are confined to slide in the smooth horizontal guide. If a horizontal force F = 10 lb is applied to the one bar at the position shown, what is the accelera- tion of the center C of the spring? Why does the re- sult not depend on the dimension b?arrow_forwardDetermine the required force P shown needed to maintain equilibrium of the scissors linkage when θ = 60°. The spring is unstretched when θ = 30°. Neglect the mass of the links.arrow_forward
- Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is transmitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components ofreaction at the journal bearing C and thrust bearing D if θ = 0°. The bearings are in proper alignment and exert only force reactions on the shaft.arrow_forwardThe coefficients of static and kinetic friction between the drum and brake bar are μS= 0.4 and μK= 0.3, respectively. If M= 50 N.m and P= 85 N. determine the horizontal and vertical components of reaction at the pin O (shown in Fig. 3). Neglect the weight and thickness of the brake. The drum has a mass of 25 kg.arrow_forwardA worker is pulling down the rope as shown. If the pulleys in the system are frictionless, and the coefficient of static friction between the crate and the floor is μs= 0.3, determine the smallest force the worker must exert on the rope in order to move the 100 kg crate, and the angle θ at this moment.arrow_forward
- Find the largest value of b/h at which the folding table is in equilibrium. The coefficients of static friction are 0.5 at A and 0.3 at C. Neglect the weight of the table.arrow_forward2. Find the horizontal force P to start the motion of any part of the system of three blocks resting upon one another as shown. The weight of the blocks are W-300 KN, Ws= 100 KN and Wc =200 KN. Between A and B μ=0.30, between C and B, μ =0.20 and between C and the ground, p=0.10. 1 sni brod nog 02.0-4 B C 05.0-4 Solution: tamos quoy worla bre sosia asquar 005 300 en of jells400 N₁-300 F3 N-300- N₂=300 Assuming B and C will not move. F₁ = 300 (0.30) F₁ = 90 kN ne à bns A zelboß 1 P = 90 kN es ensla berb hebnu 02.0- y elin 05.0= q V in Celpris orllanimetsa MX 008 Assuming C will not move: al 1st F2=400 (0.20) = 80 kN OTE Bm ribirte F₂ vica Assuming the three blocks move: F3 = 0.10 (600) F3 = 60 kN P=60 KN Least force is 60 kN.arrow_forwardin the pulley system and the diagram above, assume that the bearings at oh and C are properly aligned and smooth and that T2 =30 N all dimensions in millimeters and the belt tensions are all tangential to the pulleys a. If the shaft runs at a constant speed, determine the tension T1 b draw a free body diagram of the shaft and determine the reactions at bearing sea in terms of the components along the Y and Z axis. Assume neither bearing and oh or see produces an axial thrustarrow_forward
- The rope passes through a frictionless drum D and is connected to corner Q of the box, weighing 5 kg. Let the coefficients of sliding and non-sliding friction between the box and the inclined surface be 0.25 and 0.35, respectively. If the player exerts a pulling force T, what is the CORRECT equilibrium equation derived from the force diagram of the system? Which of the following best approximates the magnitude of the force T required for tipping to impend at point R, assuming that there is no slipping?arrow_forwardHow much work is done by the force in the spring when the slender rod rotates from the position where e = 28" to the position where 0 = 63°? The spring has a stiffness of k = 157 N/m and is stretched by 0.21 m when e =0°. The spring is connected to a fixed wall, as well as the endpoint of the rod, as shown. The rod can rotate freely about the fixed pin support at O and AO remains horizontal during motion. Take 40= 1.77 m, which is also the length of the rod. Choose the correct answer. Hoeveel arbeid word deur die krag in die veer verrig wanneer die dun staaf vanaf die posisie waar 0 28 na die posisie waar 0 = 63° roteer? Die veer het 'n styfheid van k = 157 N/m en is 0.21 m uitgerek = wanneer 0 0°. Die veer is aan die vaste muur en die endpunt van die staaf verbind, soos aangetoon. Die staaf kan vrylik om die vaste penstut by O roteer en AO bly horisontaal tydens beweging. Neem AO 1.77 m, wat ook die lengte van die staaf is. Kies die korrekte antwoord. 0. Select one: O-271 Joule 244…arrow_forwardThe position of the small 0.68-kg blocks in the smooth radial slots in the disk which rotates about a vertical axis at O is used to activate a speed-control mechanism. If each block moves from r = 162 mm to r = 200 mm while the speed of the disk changes slowly from 272 rev/min to 382 rev/min, design the spring by calculating the spring constant k of each spring. The springs are attached to the inner ends of the slots and to the blocks.arrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L