# Frame dragging and rotation

1. Aug 22, 2004

### kurious

Is there a simple mathematical relation between the speed at which the Earth spins and the magnitude of the frame-dragging effect?

2. Aug 22, 2004

### pmb_phy

bodies angular momentum. Let

$$\Delta \equiv r^2 - 2Mr + a^2$$

Let $$\omega$$ be the angular velocity of the dragging of the inertial frame. Then

$$\omega = \frac{2Mra}{(r^2 + a^2)^2 - a^2 \Delta sin^2\theta}$$

Pete

Last edited: Aug 22, 2004