A 2-m long hollow steel shaft (G = 75 GPa) has an outside diameter of 75 mm and an inside diameter of 65 mm. If the maximum shearing stress in the shaft must be limited to 50 MPa and the angle of twist must be limited to 1°, determine the maximum power (kW) that can be transmitted by this shaft when rotating at 600 rpm. 2 m

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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.