Acontinuous and aligned fiber-reinforced composite having a cross-sectional area of 1260 mm2 is subjected to an external tensile load. if the stresses sustained by the fiber and matrix phases are 142 and 4.00 mpa, respectively, the force sustained by the fiber phase is 71600 n, and the total longitudinal strain is 0.00141, determine the following:
(a)the force sustained by the matrix phase,
(b)the modulus of elasticity of the compos ite material in the longitudinal direction, and
(c) the moduli of elasticity for fiber and matrix phases.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

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.

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86