The pitch of a screw jack is 0.45cm and the arm is 60cm long. If the efficiency of the Jack is 75/π %, calculate the mechanical advantage. by Sunday | Jan 3 | Physics WAEC | 0 comments A. 400 B. 300 C. 200 D. 150 Correct Answer: Option C C. 200 Users Also Read These:A Crocodile's tail was three times as long as its…A pulley system has three pulleys in the fixed block…Calculate the light of the image formed by a pinhole…What effort will a machine of efficiency 90% apply…Birds which are large with long straight pointed…