X A thin rod of length L = 8 m and mass m has a linear density X(x) = Ax² where is the distance from the rod's left end. X(x) has units of kg/m and A = 5.91 with appropriate units that can't be displayed nicely due to Canvas limitations. Calculate the rod's moment of inertia I about an axis through x = 0 and perpendicular to the rod's length.

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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**Computation**

A thin rod of length \( L = 8 \, \text{m} \) and mass \( m \) has a linear density \( \lambda(x) = Ax^2 \) where \( x \) is the distance from the rod's left end. \( \lambda(x) \) has units of kg/m and \( A = 5.91 \) with appropriate units that can't be displayed nicely due to Canvas limitations. Calculate the rod's moment of inertia \( I \) about an axis through \( x = 0 \) and perpendicular to the rod's length.

(Hint: Evaluate the integral \( I = \int r^2 \, dm \), where \( r = x \) is the distance from the axis to each element of mass \( dm = \lambda(x) \, dx \). Note: The rod's total mass \( m \) isn't needed but, if you would like to know it, you can find it by evaluating the integral \( m = \int_0^L \lambda(x) \, dx \).)

\[ I = \, \text{________} \, \text{kg} \cdot \text{m}^2 \]

Record your numerical answer below, assuming three significant figures. Remember to include a "-" when necessary.
Transcribed Image Text:**Computation** A thin rod of length \( L = 8 \, \text{m} \) and mass \( m \) has a linear density \( \lambda(x) = Ax^2 \) where \( x \) is the distance from the rod's left end. \( \lambda(x) \) has units of kg/m and \( A = 5.91 \) with appropriate units that can't be displayed nicely due to Canvas limitations. Calculate the rod's moment of inertia \( I \) about an axis through \( x = 0 \) and perpendicular to the rod's length. (Hint: Evaluate the integral \( I = \int r^2 \, dm \), where \( r = x \) is the distance from the axis to each element of mass \( dm = \lambda(x) \, dx \). Note: The rod's total mass \( m \) isn't needed but, if you would like to know it, you can find it by evaluating the integral \( m = \int_0^L \lambda(x) \, dx \).) \[ I = \, \text{________} \, \text{kg} \cdot \text{m}^2 \] Record your numerical answer below, assuming three significant figures. Remember to include a "-" when necessary.
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