5. A skywalk is being built over a roadway in downtown Louisville. Using the information provided below:
a. Which material should be selected for a 10' long beam if the LEAST amount
of deflection is the key criteria?
b. What is the deflection in inches?
(report to x. xx decimal places)
5,000 lbf
Medal of ladity
Metal
GP
10
Cation and Aloyee
300
193
Cold West
210
210
05
Note: Use the units for E in the right column are
x10 psi
The area moment of inertia is 90 in

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?