Solve the problem.When a person bends at the waist with a straight back, the force, F, exerted by the person's lower back muscles can be estimated with the formula  where w is the person's weight, and ? is the angle made by the person's torso relative to the horizontal. Suppose that a  person bends at an angle of 35°. Determine the force exerted by the person's back muscles, and estimate the angle that requires the back muscles to exert a force of 197 pounds.

A. 29 pounds; 55.4°
B. 284 pounds; 35°
C. 199 pounds; 48.3°
D. 284 pounds; 55.4°


Answer: D

Mathematics

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