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There are three elbow flexor muscles. Suppose that the elbow joint is flexed to 90° and that these muscles are generating 290, 440, and 95 N of force and pulling at angles of 40°, 11.4°, and 17.2° respectively, relative to the horizontal. For simplicity, assume the three muscles share a common point of attachment on the radius. Calculate the direction and the magnitude of the resultant muscle force.

The unit of measurement for moment of force is N·m.

The medial and lateral heads of the gastrocnemius each exert a force of 350 N that is directed at 14.3° to the left and right of the midline of the muscle, respectively, while a person is standing in anatomical position. Determine the magnitude and direction of the resultant.

Refer to question 27 above. What is ending inventory (in dollars) at March 31, 2020 under the moving-average inventory method? (Round all calculations to nearest hundredth decimal)

The measurement of physiological cross-sectional area takes into account the length of the muscle fibers.

Suppose the graph below represents the most common form of the angle-torque relationship, such as for the elbow flexors. If the force exerted by the elbow flexor muscles remained constant at 3.5 kN over this range of motion, what would be the minimum and maximum values for the moment arm? (1 radians = 57.3 degrees.)

What measure indicates the slope of the stress-strain relationship in the linear region?

The basic genetic model for quantitative traits is expressed as .  In this model, what does represent?

Over 95% of hip fractures among older adults are due to slipping or tripping. Consider an older adult who has just tripped going up the stairs in their home. At trip initiation, they have a forward velocity of 9.47 m/sec and a vertical velocity of 3.21 m/sec. Find the angle of take-off (relative to the horizontal) and the magnitude of the resultant velocity vector.

A muscle contraction becomes less efficient as the speed of shortening increases.