Consider a circular cross-section which experiences an internal torsional load T=17 Nm, an internal bending moment M_y=24 Nm, and an internal shear force V= 10 kN. All loads act in the directions shown in the figure below. The cross-section has a diameter, d=69 mm. Given these internal loads in the cross-section, calculate the stresses at point B.
Determine the normal stress, alphaB, and shear stress tauB, at point B in MPa.

ans: SigmaB = 0.7441, TauB = -28.7895
I need help getting to the answer. Thank you.

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.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

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)