Determine by direct integration the moments of inertia of the trapezoidal area about the x- and y- axes. Find the polar moment of inertia about point O. 0.8b b 1.2b Answers: Ix = .3 64 ly %3D i .304 b4 lo = %3D .604 64

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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.