A seesaw is an example of a first class lever The fulcrum, which is the part of the lever that does not move, is in the middle. The resistance, which is the weight (person) you are trying to lift is at one end. The effort, which is the force applied to the lever, is the person sitting on the other end.
<span>the answer for this is Veins and Arteries</span>
<span>Addiction is compulsive.</span>
Yoga
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Jogging
Walking
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CrossFit
Diagnosing a disease is concerned with one individual.
