We analyzed the biceps muscle example with the angle between forearm and upper arm set at 90 (see figure below). Triceps muscle FE FB 12 Biceps muscle ma CG Wa 13 PHYSICS mb CG W Find the force exerted by the biceps muscle when the angle is 130 and the forearm is in a downward position. (Assume that = 4.4 kg. Enter the magnitude.) mb 478.96 X N r = 5.0 cm, r = 12 cm, 3 = 36 cm, ma = 2.4 kg, and