Ice Skater#

We model a 58 kg and 165 cm tall ice skater when spinning with arms and legs in as a solid cylinder of diameter \(40\) cm.

Part 1#

Determine her moment of inertia(\(I\_{in}\)).

Answer Section#

Please enter in a numeric value in kg \(\cdot\) \(\rm{m^{2}}\).

Part 2#

Calculate her angular momentum (\(L\_{in}\)) when she is spinning with an angular speed of \(\omega\_{in}\) = \(4\) rev/s. [ Hint: you do not need to change rev/s to rad/s]

Answer Section#

Please enter in a numeric value in kg \(\cdot\) \(\rm{m^{2}}\) \(\cdot\) \(\frac{rev}{s}\).

Part 3#

She suddenly extends her arms and one of her legs outward so that her moment inertia increases to \(I\_{out}\)= \(4.3\) kg\(\cdot\)\(\rm{m^{2}}\) . What will be her final angular speed (in rev/s)?

Answer Section#

Please enter in a numeric value in \(\frac{rev}{s}\).

Attribution#

Problem is licensed under the CC-BY-NC-SA 4.0 license.
The Creative Commons 4.0 license requiring attribution-BY, non-commercial-NC, and share-alike-SA license.