Estimate the rotational inertia of a gymnast performing a flyaway dismount from

Question

Estimate the rotational inertia of a gymnast performing a flyaway dismount from the high bar.

Estimate the rotational inertia of a bicycle wheel.

Estimate the rotational inertia of Earth about its rotation axis.

Do you think your estimate is higher or lower than the actual rotational inertia? Explain.

Estimate the rotational inertia of a gymnast performing a flyaway dismount from the high bar. Estimate the rotational inertia of a bicycle wheel. Estimate the rotational inertia of Earth about its rotation axis. Do you think your estimate is higher or lower than the actual rotational inertia? Explain.

Explanation / Answer

1)Interita=2/5mR^2

2) I = m r^2

3) I = 0.4mr^2

as we know inertia in geberal cases 1/2m r^2

but in these cases,for cycle wheel inerta is greater than general and for inertia of a gymnast performing a flyaway dismount from the high bar and inertia of Earth about its rotation axis is less than general inerta.

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