Assume the image below is your arm and you are lifting a 15 lb weight. your arm is now at a 50-degree angle to your body. The force from the muscle is vertical. The weight of your arm is 5 lbs. dbiceps is 2cm and dball is 6cm. Please draw a free body diagram of the arm at that 50-degree angle with the forces. What is the force that the muscle puts on the arm? What is the force from the muscle if the weight is all the way up?

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