Hold your hand out with your elbow at your side and your forearm parallel to the ground. You should notice your bicep muscle flexing in order to keep your forearm in equilibrium in this position, working against the force of gravity. To maintain this equilibrium, how does the force that your bicep exerts on the forearm compare with the force of gravity acting on the forearm?
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Hold your hand out with your elbow at your side and your forearm parallel to the ground. You should...
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