• We are currently rolling out incremental alterations to the forum. Don't freak! You aren't going crazy.

Calc Mistborn - Vin spins the planet

Calculations
Vin with the power of Preservation spins the planet around in an incredibly short timeframe, and the Sun is noted to drop below the horizon in less than a second. Using this formula for help.

Er rotational energy (J)
I moment of inertia around the axis of rotation (kg*m^2)
ω angular velocity (1/s)
Using the values of the Earth for this. The circumference of the Earth is 40075km, and half of that is 20037.5km, or 50% of the circumference of the planet. This calculator gives us a result of 3.1415926535898 radians from that percentage. The mass of the Earth is 5.97219e24kg and its surface area is 5.1 X 10^8 km^2 (or 5.1e14m^2).

E = 1/2Iw^2
= 1/2 (5.97219e24 X 5.1e14) X 3.1415926535898^2
= 1.50305039e40 joules
= 3.5923766491395793855 tenatons

That's energy. What about speed? Timeframe is less than a second, but we'll go with a second.

T = 20037.5km/1s
= 20037500/340.29
= Mach 58883.5993

I'm not sure how accurate the rotational kinetic energy method is, so let's also try the normal formula for kinetic energy.

KE = (0.5)mv^2
= (0.5) X 1.19892134e39 X 20037500^2
= 286.54907743785850471 ninatons

Final Results
Vin rotates the planet (energy - low end) = 286.549 ninatons
Vin rotates the planet (energy - high end) = 3.592 tenatons
Vin rotates the planet (speed) = Mach 58883.599

Comments

There are no comments to display.