Why is the rotational inertia greater for a gymnast when she swings by her hands from a

**galluer** · 04-22-2009, 09:29 PM

Conservation of Angular Momentum. (Radius of stretching ) ^2 x Angular Frequency = const.

**Marlo** · 04-22-2009, 09:29 PM

horizontal bar wit? Why is the rotational inertia greater for a gymnast when she swings by her hands from a horizontal bar with her body fully extended than when she executes a somersault with her body fully extended?

**galluer** · 04-22-2009, 09:30 PM

Conservation of Angular Momentum. (Radius of stretching ) ^2 x Angular Frequency = const.

04-22-2009, 09:33 PM

Rotational Inertia = 1/2 M x r x r (half - M r squared)

So If gymnast is extending her hands, the r (radius of rotation) increases which increases the inertia

04-22-2009, 09:33 PM

Rotational Inertia = 1/2 M x r x r (half - M r squared)

So If gymnast is extending her hands, the r (radius of rotation) increases which increases the inertia