College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 122

In Fig., what is the force F m supplied by the deltoid muscle so as to hold up the outstretched arm if the mass of the arm is 3.0 kg ( F j is the joint force on the bone of the upper arm-the humerus.)

FIGURE Arm in static equilibrium See Exercise.