The diagram above illustrates a block and tackle pulley system in which an effort E supports a load of 100.0N. If the efficiency of the machine is 75%, calculate the value of E. By: Sunday|Published on: Jan 25|Categories: Physics WAEC| 0 comments A. 22.2N B. 38.0N C. 67.0N D. 75.0N Correct Answer: Option A A. 22.2N Users Also Read These:A machine has an efficiency of 60%. If the machine…The efficiency of a wheel and axle is 100% and the…A load of mass 120kg is raised vertically through a…A block and tackle pulley arrangement has 6 pulleys…The fiqure above represents a block-and-tackle…SEE ALSO An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5ºC per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]