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Compressional force in the spine when a person bends forward

Referring to the person is figure P12.51 on Page 384 in the text, determine the compressional force in the spine when the person bends forward to lift a 300 N object. The spine and upper body are represented as a uniform horizontal rod of weight 400 N. The erector spinalis muscle attaches at a point two thirds of the way up the spine and the angle between the spine and this muscle is 13.0o. A.550N B.650N C.2250N D.3250N Please see attached file for figure P12.51


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Solution is provided in a 2-page word document. Every step is clearly shown for the student. This solution also includes a diagram to show the forces acting on the person.