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 machine has an efficiency of 60%. If the machine…The handle of a screw jack is 35 cm long and pitch…What effort will a machine of efficiency 90% apply…Calculate the velocity ratio of a screw jack of…Birds which are large with long straight pointed…