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Sect. 10.3 & 4 vocab

Vocabulary from chapters 10.3 and 10.4

QuestionAnswer
Biceps The muscle in the arm that pulls your hand to your face
Triceps The muscle in the arm that pulls your hand away from your face
Contract When a muscle pulls on a bone and becomes shorter
Relax When a muscle is not pulling on a bone and becomes longer
Force A push or a pull, with muscles, it is always a pull
Lever A simple machine which has a bar that pivots on a fulcrum (point)
Mechanical Advantage The amount of force that a machine multiplies the force put into it
Input Force The amount of force put into a lever to lift a load
Output Force The amount of force that is created when a lever lifts an object
Class 1 lever When the fulcrum is between the input force and the output force; example: see-saw
Class 2 lever When the output force is between the input force and the fulcrum; example: wheel barrow
Class 3 lever When the input force is between the fulcrum and the output force; example: stapler
Created by: MRS.A