Certified Industrial Ergonomic Evaluator (CIEE)

In biomechanics, what is the 'moment arm' (lever arm)?

The weight of the load being lifted The perpendicular distance from the axis of rotation to the line of force action The speed at which a joint moves through range of motion The total force applied by a contracting muscle

Correct Answer:

The perpendicular distance from the axis of rotation to the line of force action

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