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1. The structure shown consists of five pin-connected members (members AC and BD do not intersect). In addition to the 4kip force shown, the individual members of the structure have the weights listed in the table. Idealize the structure to be a truss and determine the forces supported by each member using the method of joints.
Member
Weight, lb
AB
400
AC
100
BC
200
BD
CD
2. The top chord of the steel truss is subjected to the load shown. The truss has support reactions Ay, Mx, and My from a roller at A and a pin at M. Determine the force supported by member FH using the method of sections. All angles are 60°.
3. A metal bottle cap opener is shown. If a vertical force of 10N at point A is required to remove a bottle cap, determine the internal forces that develop on cross section D.
4. A 5° steel wedge is used to level a 10ft long uniform steel beam AB weighing 400lb. The ends of the beam are supported by concrete walls D and E. Determine the force needed to drive the wedge to the left, and describe the motion of the beam that results (if end B of the beam is lifted or if the entire beam slides to the left). The coefficients of static friction are 0.4 for steel-on-steel contact and 0.3 for steel-on-concrete contact.
5. A rectangular area with base b and height h, and centroid at point C is shown. Determine the area moments of inertia Ix and Ix'.
The two disks each have a mass of 25kg and are attached at their centers by an elastic cord that has a stiffness of k = 1.6kN/m . Determine the stretch of the cord when the system is in equilibrium
A simply supported span of 28 feet must carry a uniform loading that produces a total factored maximum moment of 300 K-ft including the beam weight. The concrete can be 3.5 ksi and the steel is grade 60.
Air mass of 4 kg of liquid water is cooled from 90c to 10c under a constant pressure. Determine the change in its entropy, assuming the process to be reversible.
A canal was constructed running parallel to a river 1500 ft away. Both fully penetrate a sand aquifer with a hydraulic conductivity of 1.2 ft/d. The area is subject to rainfall of 1.8 ft/y and evaporation of 1.3 ft/y.
A 50-kg crate is pulled by the constant force P at an angle of 30 deg off the x axis- the crate starts from rest and achieves a speed of 10 m/s in 5 s. the coefficient of kinetic friction between the crate and ground is 0.2.
A chalk core plug having a pore volume of 17.0307 cm3 is fully saturated with reservoir brine. A synthetic oil flood is conducted on this plug. It is found that 12.25 cm3 of reservoir brine was displaced from this plug by the synthetic oil.
Why is the torque on A and the torque on AB opposite? Wouldn't they be the same? How do we know which direction the torque is applied at A to begin with? It's not specified.
it is found that the lifetimes of television tubes manufactured by a company have a normal distribution with mean of 2000 hours and standard deviation of 60 hours. if 10 tubes are selected at random
A suppressed rectangular weir is being used to measure flows in anirrigation canal. The weir is 5 m wide and 2m high and, under floodconditions, the upstream and downstream depths are measured at 2.5mand 2.3 m, respectively.
In my english class i have to write a propasl, and i choose to write a proposal on the libray doors at my school. the doors are very difficult to open even for young people like my self. who should i contact
Determine the pump power in W & hp required to pump water froma tank at the base of the world's tallest building (1667 ft) to ahot tub of similar size on the roof. Ignore friction losses& changes in atmospheric pressure due to change inelevation. Flo..
Assume the collector provides this energy to a thermal storage unit (a thermal reservoir) at 220oC. A heat engine receives energy from this thermal storage unit and discharges energy by heat transfer to the surroundings at 20 C
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