The forearm is in equilibrium. Therefore, the acceleration is zero.
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 1.00 kg. If the biceps is connected to the forearm a distance dbiceps = 3.50 cm from the elbow, the force Fbiceps = 113.96 N is exerted to hold a 600 g ball at the end of the forearm at distance dball = 37.0 cm from the elbow, with the forearm parallel to the floor.
Which of the following should the forearm be modeled as?
A. a particle moving with constant acceleration
B. a flexible rod moving with constant acceleration
C. a rigid rod moving with constant acceleration
D. a particle in equilibrium
D.a flexible rod in equilibrium
E.a rigid rod in equilibrium
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