Please answer

The rigid bars ABC and CD are supported by pins at A and D and by a steel rod at B. There is a roller connection between the bars at C. Compute the vertical displacement of point C caused by the 50-kN load.

 

 

Q1 (10 points): Two identical circular cylinders of radius r and mass m each, are connected by a spring, as shown below. Derive the equations of motion using Lagrange's equations. Please indicate the lowest natural vibration frequency.  

Compute the diameter of a mild steel rod which have been cold 
worked to 27.59% having original diameter of 23.15mm?

plz answer its question.

Assuming a linear velocity profile, find the boundary layer thickness the wall shear stress, the displacement thickness and the drag for a flat plate with zero pressure gradient and free stream velocity U0. The plate has length L and width b. Do you have flow separation? If the answer is yes or no, explain why.