16-70. The beam has a constant E,h and is suppolted by the fixed wall at Band the fod AC. If the Fod has a cfoss-sectional afca Az and the material has a modulus of clasticity Ez determine the fotee in the Fod.
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- The cylinder has a mass of 30 kg and is mounted on an axle that is supported by bearings at A and B. If the axle is turning at 40 rad/s (direction see figure) determine the vertical components of force acting at the bearings at this instantIf the 20-mm-diameter rod is made of A-36 steel and the stiffness of the spring is k = 50 MN>m, determine the displacement of end A when the 60-kN force is applied.The ladder has a uniform weight of 80 lb and restsagainst the wall at B. If the coefficient of staticfriction at A and B is μ = 0.4 determine the smallestangle θ at which the ladder will not slip.
- A force of 10 kN is applied to the hook. If the CB cable is made of steel (E= 200 GPa) and has a diameter of 8.5 mm, determine its displacement. Consider the distance CB shown below as the initial length.The automobile has a mass of 2 Mg and center of mass at G. Determine the towing force F required to move the car if the back brakes are locked and the front wheels are free to roll. Take us=0.3.The rigid bar is supported by the two short white spruce wooden posts and a spring. If each of the posts has an unloaded length of 1 m and a cross-sectional area of 600 mm2, and the spring has a stiffness of k = 2 MN >m and an unstretched length of 1.02 m, determine the vertical displacement of A and B after the load is applied to the bar.
- The automobile has a mass of 2000 kg and center of mass at G. Determine the towing force F required to move the car. Both front and rear brakes are locked. The μs=0.3.Determine the mass of the R-134a.When the 100-lb block is at h = 3 ft above the cylindrical post and spring assembly, it has a speed of = 20 ft>s. If the post is made of 2014-T6 aluminum and the spring has the stiffness of k = 250 kip>in., determine therequired minimum diameter d of the post to the nearest 1/8 in. so that it will not yield when it is struck by the block
- 2. The block has a mass of 5.8 kg and rests on the smooth plane. Determine the unstretched length of the spring. Round to three significant figures.6-10The post is made of Douglas fir and has a diameter of 100 mm. If it is subjected to the load of 20 kN and the soil provides a frictional resistance that is distributed along its length and varies linearly from w = 4 kN>m at y = 0 to w = 12 kN>m at y = 2 m, determine the force F at its bottom needed for equilibrium. Also, what is the displacement of the top of the post A with respect to its bottom B? Neglect the weight of the post.