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 screw jack with a Tommy bar of length 12cm is used…Two spanners X and Y of lengths 15cm and 20cm…A pulley system has three pulleys in the fixed block…The handle of a screw jack is 35 cm long and pitch…An elastic material has a length of 36cm when a load…