Hold your upper arm vertical and your lower arm horizontal with your hand holding a 191 N dumb-bell, as shown in the Figure. You’ll feel that your biceps muscle has contracted and is trying to pivot your lower arm about the elbow joint (black dot in the figure). For a person with the arm dimensions shown, what force, in N, must the biceps muscle provide? You can ignore the mass of the arm and hand in your calculation.

A skeletal diagram of a hand holding aload is shown in the upper figure. If theload and the forearm have masses of 2kg and 1.2 kg, respectively, and theircenters of mass are located at G1 andG2, determine the force developed inthe biceps CD and the horizontal andvertical components of reaction at theelbow joint B. The forearm supportingsystem can be modeled as the structuralsystem shown in the lower figure.

If the biceps brachii, attaching to the radius 2.5 cm from the elbow joint produces 250 N of tension perpendicular to the bone, and the triceps brachii attaching 3 cm away from the elbow joint exerts 200 N of tension perpendicular to the bone how much net torque is present at the joint?Question 23Select one:a.0.25 Nm flexionb.0.25 Nm extensionc.No movement at the jointd.2.5 Nm flexione.2.5 Nm extension

This diagram shows muscles and tendons in the upper arm. When the biceps muscle contracts, which way does the hand move?up, toward the shoulderdown, away from the shoulderSubmit

The arm in the figure below weighs 44.1 N. The force of gravity acting on the arm acts through point A. Determine the magnitudes of the tension force Ft in the deltoid muscle and the force Fs exerted by the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown. (Enter your answers to at least the nearest newton.)Ft  =  Enter a number. NFs  =  Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. NAn arm is extending horizontally to the right with a cutout that shows muscles in the upper arm. A horizontal dashed line extends along the bottom of the muscles and another along the top. Point O is labeled at the left end of the arm on the lower horizontal line. An unlabeled point lies 0.080 m horizontally to the right of point O. Point A lies 0.290 m horizontally to the right of point O. Three forces are acting on the arm.A force vector Fs acts down and right on point O at an acute angle 𝜃 below the horizontal.A force vector Ft acts up and left on the unlabeled point at an angle 12° above the horizontal. Vector Ft is longer than vector Fs.A force vector Fg acts vertically down on point A. Vector Fg is shorter than vector Fs

The deltoids exert a force of 100 N at an angle of 45 degrees to the humerus.The tendon inserts 7.5 cm from the shoulder joint axis of rotation.The arm is abducted 45 degrees from the vertical or anatomical position.The combined weight of the upper arm, forearm, and hand is 75 N acts at the center of gravity of the upper extremity which is 15 cm from the shoulder joint axis.What is the torque about the shoulder developed by the deltoids in Nm?