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1. An aluminum bar 125 mm (5.0 in.) long and having a square cross section 16.5 mm (0.65 in.) on an edge is pulled in tension with a load of 66,700 N (15,000 lbf), and experiences an elongation of 0.43 mm (1.7 X 10-2 in.). Assuming that the deformation is entirely elas- tic, calculate the modulus of elasticity of the aluminum.
2. Consider a cylindrical nickel wire 2.0 mm (0.08 in.) in diameter and 3 X 104 mm (1200 in.) long. Calculate its elongation when a load of 300 N (67 lbf ) is applied. Assume that the de- formation is totally elastic.
3. For a brass alloy, the stress at which plastic deformation begins is 345 MPa (50,000 psi), and the modulus of elasticity is 103 GPa (15.0 X 106 psi).
tension. Determine its elongation when a load of 65,250 N (14,500 lbf ) is applied.
The 160-N weights of the arms AB and BC of the robotic manipulator act at their midpoints. Determine the sum of the moments of the three weights about A.
a constant-volume tank contains 10 lbm of ammonia initially at 30 lbfin2 and 80degf 539.67degr. the ammonia is then
steam enters a turbine with a pressure and temperature of 12.5 mpa and 700 oc and leaves at 50 kpa as a saturated
Class 20 and class 60 gray cast irons have tensile strengths of about 20 and 60 ksi respectively. Assuming that the fractures start from graphite ?akes and that the ?akes act as preexisting cracks, use the concepts of Grif?th analysis to predict t..
an insulated cylinder is initially divided into halves by a frictionless thermally conducting piston. on one side of
a 10 kg space probe travels in a straight line with initial velocity 20 ms. the engines apply a force f5t in the
We have 0.25 lb of refrigerant 134a at 35 psi, and a quality of x=0.15. If it is expanded, in a constant pressure process, to two times it's original volume, determine the final temperature, and find the work of the constant process.
a long power transmission cable is buried at a depth ground to cable centerline distance of 2 meters. the cable is
A closed system consisting of 8.25 lb of a gas undergoes a process during which the relation between pressure and volume is pV^n = constant. The process begins with p1 = 18 lbf/in^2 , v1 = 1.25 ft^3 /lb and ends with p2 = 53 lbf/in^2 , v2 = 0.5 ft^3 ..
a cannonball with mass m is fired with an initial speed v0 at an angle theta ablve the horizontal. compute the time it
an elevator moves downwards at a constant velocity v0. while descending at a particular height assuming t0 the velocity
The gage pressure in an automobile tire when measured during winter at 32 o F was 32 psig. The same tire was used during the summer when the temperature rose to 112 o F. If we assume that the volume of the tire did not change, and no air leaked out b..
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