Question

Using static analysis, solve for the net μscle force, Fm (in N). For this problem, it is important to note that the forearm and ball are stabilized and in a state of rest. Therefore, the sum of μscle torque, torque of the forearm, and torque of the ball.

a) Torque of the forearm
b) Torque of the ball
c) Gravitational force
d) Frictional force

Answer 1

To find the net muscle force, set up torque equations using the conditions for equilibrium.

Step-by-step explanation:

There are four forces acting on the forearm and its load: the biceps force, the elbow joint force, the weight of the forearm, and the weight of the ball. The torque of the forearm can be calculated by multiplying the weight of the forearm by the perpendicular distance from the pivot point. The torque of the ball can be calculated by multiplying the weight of the ball by the perpendicular distance from the pivot point. The gravitational force is the weight of the forearm and the weight of the ball combined. The frictional force depends on the coefficient of friction between the forearm and the ball and the normal force.

To find the net muscle force, we need to use the conditions for equilibrium. Since the forearm and ball are in a state of rest, the sum of the muscle torque, torque of the forearm, and torque of the ball must be zero. By setting up the torque equations and solving for the muscle force, we can find the net muscle force.