## Related questions with answers

A $60.0-\mathrm{kg}$ woman stands at the rim of a horizontal turntable having a moment of inertia of $500 \mathrm{~kg} \cdot \mathrm{m}^2$ and a radius of $2.00 \mathrm{~m}$. The turntable is initially at rest and is free to rotate about a frictionless, vertical axle through its center. The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of $1.50 \mathrm{~m} / \mathrm{s}$ relative to the Earth. (b) How much work does the woman do to set herself and the turntable into motion?

Solutions

VerifiedWhen an object rotating about an axis or its axis with an angular speed, it has rotational kinetic energy $KE_r$. This rotational kinetic energy is analogous to the translational kinetic energy and it is given by equation (8.10) in the form

$\begin{equation} K E_{r}=\frac{1}{2} I \omega^{2} \end{equation}$

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