The handle of a screw jack is 35 cm long and pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 22/7]? by Sunday | Mar 24 | Physics WAEC | 0 comments A. 152.0N B. 132.0N C. 15.2N D. 440.0N Correct Answer: Option C = 15.2N Users Also Read These:A screw jack with a Tommy bar of length 12cm is used…A 90cm uniform lever has a load of 30N suspended at…A block and tackle system has six pulleys. a force…What effort will a machine of efficiency 90% apply…A simple machine with an efficiency of 75% lifts a…