An orthopedic implant is being designed by a biomedical engineer. The implant needs to be evaluated for stress under bending. Calculate the moments of inertia, Ix and Iy, of the following area. Comment on which bending direction will lead to lower stress.

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Q: 75 mm 15 mm

A: given:

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Q: The shear stress and the polar moment of inertia are inversely proportional.

A: For solution refer below images.

Moment of Inertia

Inertia can be termed as a resistance offered by a body to change its state. A rigid body initially at rest will apply resistance when acted by an external force that tends to change its state of rest or velocity, or a body initially at motion will provide resistance in changing its state of velocity or motion for coming to a state of rest. In other words, Newton's first law of motion describes the law of inertia of a rigid body.