A motor drives an shaft through a set of gears at 630 rpm, as shown in the figure. Thirty horsepower is supplied to one machine on the right and 90 hp to another on the left. a) Select a solid round shaft of the same size over its entire length if the allowable shear stress is 5759 psi. b) determine the angle of torsion between the end gears of the shaft. Sea G = 8x10 ^ 6 psi.

Q: F2 = 40 N %3D 4 m F= 70 N %3D 2 m 3 m B. 3m 2 m 3 m

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Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.