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Math/physics Proof

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Posted by Richard Ruquist on February 6, 2002 15:21:11 UTC

From the circumference of the earth and the period of one revolution, we can estimate angular velocity of its spin. We then use this as an initial condition is the spin equivalent of Newton's f=ma equation.

Torque=Inertia*angular acceleration

Since angular acceleration = d/dT * angular velocity, we can solve the above equation for the angular velocity of the earth as a function of time T. Since there is no torgue applied to the earth, the solution is that the angular velocity equals a constant. Therefore we can predict that the angular velocity will be the same every day.

Then assuming that the sun will not supernovae in the near future, it will continue to rise everyday from our perspective.

This is a rather simplistic proof. But it represents the usual type of math/physics proof- proof by theoretical prediction and experimental verification.

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