The human forearm is a class III lever. Find the force the biceps muscle of an upper
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The human forearm is a class III lever. Find the force the biceps muscle of an upper arm must develop to lift further a 5-kg dumbbell held in the hand of a person whose forearm is horizontal. How many pounds is this? Assume the force is exerted at a point 2.5 cm in front of the person’s elbow and that the hand is 32 cm in front of the elbow.
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