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|Published on: Jan 3|Categories: Physics WAEC| 0 comments A. 400 B. 300 C. 200 D. 150 Correct Answer: Option C C. 200 Users Also Read These:A pulley system has three pulleys in the fixed block…Calculate the light of the image formed by a pinhole…A screw jack with a Tommy bar of length 12cm is used…Calculate the velocity ratio of a screw jack of…If the mechanical advantage of a machine is 4. What…SEE ALSO Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?