Aload of 2000kg is to be raised. the operator can apply a maximum effort of 735n and has a choice of 2 simple machines, see fig q2. a differential wheel and axle with a wheel diameter d= 650mm and axle diameters of d2 = 75mm and d1 = 50mm or a screw jack with a handle radius r = 380mm and screw pitch p = 25mm. i) determine which machine can be used without the risk of overhauling. (19 marks) ii) find the maximum safe load which can be raised by the machine which will overhaul with the 2000kg load.

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.

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options