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April 20, 2014

Homework Help: Physics

Posted by Sally on Tuesday, January 31, 2012 at 11:00am.

The figure shows the treatment of fractures of the humerus shaft with a cast of the upper arm bent by 100 to 110 degrees at the elbow joint, and an attached traction device. The traction device keeps the upper arm under tension to lower the risk of fracture dislocation due to muscle contraction. What mass must be used for the traction device if the muscle force it must compensate is 7.5 N?

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