# Static equilibrium problems

Sigchi4life
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Question description

When you lift an object by moving only your forearm, the main lifting muscle in your arm is the biceps. Suppose the mass of a forearm is 1.40kg. If the biceps is connected to the forearm a distance (d)biceps = 3.50cm from the elbow, how much force (F)biceps must the biceps exert to hold a 800ball at the end of the forearm at distance (d)ball = 35.0cm from the elbow, with the forearm parallel to the floor? How much force (F)elbow must the elbow exert?

What is the magnitude of the force exerted by the biceps Fbiceps? What is the magnitude of the force exerted by the elbow Felbow?

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