7. A Wheel and axel is to be used to lift a 50kg load. If the maximum effort available is 60 N and the axle is 75 cm in diameters, what will the axle diameters have to be if the machine is 90% efcient? A]9.l7 cm 3110.19 cm (319.17 cm 1)] 8.26 cm E] 40 cm 8. The Actual Mechanical advantage of the wheel and axle above is: A] 8.175 319.08 17.36 D] .53 E] 1.88 1. A four metre beam has a mass of 20kg per metre. It supports a distributed load of 50 kg and a concentrated load of 200 N. The distributed load is 0.5 m long and its left edge is 1 m from the left end of the beam. The concentrated load is located Im from the right end of the beam. What are the values of the reactions at the ends of the beam? A] 695.68N / 779.62N B]333.94N / 356.56N c1208.75N/ 121.25N D] 664.25N / 809.88N E]2047.44N/ 1189.06N