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Posted: August 2nd, 2021
4) A rehab patient exerts a biceps force FB while quickly flexing their forearm and hand, as shown. At the instant shown, the forearm is tilted 25 below horizontal and is moving counter-clockwise with an angular velocity of = +4.0 rad/s and an angular acceleration of = +6.0 rad/s2.The patientâs forearm and hand have a mass of 5.2 kg and a length of 38 Rx cm. The center of mass of their forearm plus hand is 40% of the distancefrom their elbow to their hand. The radius of gyration about the center ofmass of the forearm and hand is 32 cm.a) Determine the total moment of inertia of the patientâs forearm and hand about the elbow joint.b) Determine the magnitude of the muscle force, FB, causing this motion.c) Determine the magnitudes of both the tangential and centripetal accelerations of the center of mass of the forearm.d) Use your answers from (b) and the coordinate system shown to determine the magnitudes of both reaction forces, Rx and Ry. What do these two forces represent physically?
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