Question

How do you think real pulley systems are different, and how would that affect the mechanical advantage of real pulley systems?

Answer 1

Answer:

energy?1.Observe: Lift the 80-N load with different pulley systems. Notice the length of the rope pile. How does adding pulleys affect the distance you have to pull the rope to lift the object? Males the rope longer so it can go all the way around the pulleys. 2.Gather data: Lift the 80-N load to the top with each pulley system. In each case, record the input force, input distance, output force, and height. Include units.Pulley systemInput force(N)Inputdistance (m)Output force(N)Height (m)1 fixed868.75868.751 fixed, 1 moveable4316.80868.402 fixed, 2 moveable2326.80926.703 fixed, 3 moveable1625.80964.303.Calculate: When a force is exerted over a distance, workis done on an object. Work is measured in joules (J) and is equal to the product of force and distance: W= F •d. For eachpulley system, calculate the input work (input force • input distance) and the output work (output force • height). Units of work are newton-meters, or joules (J).Pulley systemInput work (J)Output work (J)1 fixed752.5752.51 fixed, 1 moveable361.2722.42 fixed, 2 moveable154.1616.43 fixed, 3 moveable68.8412.84.Analyze: Work is a measure of energy. Look at each pair of input-output values. How do pulley systems illustrate conservation of energy? The set of numbers on the output side is bigger than the numbers on the input side. Extension: Friction and efficiencyGet the Gizmo ready: Select 1 fixed pulley, and set the Weightto 40 N.