Fie prisma cu baza [ABC] un triunghi dreptunghic în B, isoscel |AB|=|BC|, A(10,10,0), B(70,10,0), ȋnǎlțimea prismei segmentul |BB1|= h=120. Prisma se sectionează cu un planul de capǎt [P] definit de Px (100,0,0) şi face un unghi de 45o cu planul [H]. Să se determine secțiunea rezultată şi adevarata mărime a acesteia, prin metoda rabaterii. Sǎ se desfǎşoare trunchiul de prismǎ [ABC123] rezultat.

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

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.