pe chapter 2 0.0 / 5 ? Physical Educationmovement analysisGCSEAQA Created by: lydiam123Created on: 04-01-17 12:54 what is a fulcrum the fixed point at which a lever turns or is suported 1 of 13 what is resistance the load to be moved by a lever system. this usually involves weights 2 of 13 what is effort the force required to move the load 3 of 13 1st class levers at the elbow joint where the triceps cause extension at the lower joint 4 of 13 2nd class levers where the gastrocnemius causes plantar flexion 5 of 13 third class levers th emajority of the bodies joints act as third class levers 6 of 13 1 2 3 f r e 7 of 13 describe mechanical advantage the benefit to a lever system of having either a short effort arm or a short resistant arm 8 of 13 how much mecanical advantage do the 1st class levers have either low or high depending on where the fulcrum is 9 of 13 how much mechanical advantage does the 2nd class levers have low because the levers effort arm is shorter than the load arm 10 of 13 example of a first class lever canooeing down a stream. the load is the water, the effort is the arm and the fulcrum is the shoulder 11 of 13 example of 2nd class lever push ups. the fulcrum is the feet, the load is the body and the effort is the arms 12 of 13 example of 3rd class lever weight lifting. the load is the weight, the effort is the bicep and the fulcrum is the shoulder 13 of 13
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