A machine of velocity ratio 5 is used in lifting a load with an effort of 500N. If the machine is 80% efficient. Determine the magnitude of load. By: Sunday|Published on: May 21|Categories: Physics WAEC| 0 comments A. 2500N B. 2000N C. 900N D. 625N Correct Answer: Option B B. 2000N Users Also Read These:A machine has an efficiency of 60%. If the machine…The fiqure above represents a block-and-tackle…A machine of efficiency 80% is used to lift a box.…A machine whose efficiency is 60% has a velocity…The diagram above illustrates a block and tackle…SEE ALSO When three coplanar and non-parallel forces are in equilibrium; which of the following statements above are correct?