A patient recovering from elbow surgery is attending physio to strengthen the biceps muscle in her arm. It is important that the elbow joint does not experience a force greater than 206 N during the early stages of recovery. The physio chooses a 10 kg weight for the patient to hold. The forearm, which weighs 2.1 kg, is maintained in a horizontal position by the biceps muscle supplying 610 N of force. Solve the force triangle to find the maginitude of the reaction force in the elbow correct to three significant digits? Recall that the acceleration due to gravity, g, is 9.81 ms2 and that Force (N) = mass (kg) x g (ms2)
