A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N. Calculate its mechanical advantage? by Sunday | Aug 29 | Physics WAEC | 0 comments A. 0.7 B. 0.9 C. 1.5 D. 2.5 E. 10.0 Correct Answer: Option C – 1.5 Users Also Read These:A plane inclined at an angle at 30° to the…A machine has a velocity ratio of 4; if it requires…A block and tackle pulley arrangement has 6 pulleys…A 20kg mass is to be pulled up a slope inclined at…A machine of efficiency 80% is used to lift a box.…