The forearm is in static equilibrium, so the vertical force on the end of the forearm at the elbow must cancel out this 483 lbs upward force, meaning that the vertical force on the elbow end of the fo...The forearm is in static equilibrium, so the vertical force on the end of the forearm at the elbow must cancel out this 483 lbs upward force, meaning that the vertical force on the elbow end of the forearm is 483 lbs downward. Draw a free body diagram of the elbow showing the forces from the ball weight, the bicep tension, and the upper arm pushing on the forearm.
