A Ten-Pound Weight Is Held So That It Can Be

question 17

Multiple Choice

A ten-pound weight is held so that it can be moved in either direction by the biceps and triceps (e.g. arm abducted with flexion and extension in the horizontal plane) . How much effort will the triceps need as compared to the biceps where the effort arm is 1 inch for the triceps and 2 inches for the biceps? The weight is held in the hand at a point 12 inches from the elbow.

• A) triceps 2 1/2 times as much as biceps
• B) triceps 2 times as much as biceps
• C) triceps same as biceps
• D) triceps 1/2 as much as biceps

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