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|Published on: Aug 29|Categories: 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:The efficiency of a wheel and axle is 100% and the…A machine has a velocity ratio of 4; if it requires…If the mechanical advantage of a machine is 4. What…A machine of velocity ratio 6 requires an effort of…The diagram above illustrates a block and tackle…SEE ALSO The diagram shows the variation of volume V of gas with temperature at the point X is