A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N; calculate the efficiency of the machine By: Sunday|Published on: Nov 4|Categories: Physics JAMB| 0 comments A. 80.0% B. 76.6% C. 66.7% D. 60.7% Correct Answer: Option C – 66.7% Users Also Read These:What effort will a machine of efficiency 90% apply to a load…The diagram above illustrates a block and tackle pulley…The fiqure above represents a block-and-tackle pulley system…A block and tackle system has 6 pulleys. If the efficiency…A machine of velocity ratio 6 requires an effort of 400N to…SEE ALSO The critical angle for light travelling from a transparent medium to air s measured as 34°. The refractive index of the medium is?