Calc The Day of Lavos (Chrono Trigger)

Calculations
Damn all of these JRPGs I have lined up to play :catprone

[YOUTUBE]5B-JRDsSqec[/YOUTUBE]

You can watch Lavos start fucking everything at about 50 seconds in.

I've seen people do calcs for this feat before (Nevermind? :hmm) but far as I can tell it was never for the KE of the giant rocks Lavos raises up by emerging from the ground.

ZIJYG71.png



Protip: The relevant scaling is on the left side of the center continent.

This is the CT world map in the year 1999 A.D., which is the year Lavos initiates Armageddon. No reason not to emply standard assumption that CT Earth is as large as ours AFAIK. However, I'm still less than halfway done, so if I'm wrong about anything at all in this blog then feel free to correct me.

As for the scaling, those pathways between the domes and shit are likely not at all to scale, but they are consistent between the map and the cutscene with Lavos, so it wouldn't matter anyway.

The width of the above map is 1536px, so...

(40075/1536)8=208.724km

TXDdClP.png



(208724/25)38=317260.48m

(208724/25)37=308911.52m

Those bottom two rocks look vaguely spherical :catnoworries

vsphere1=(4/3)pi*r^3
v=(4/3)pi*(317260.48/2)^3
v=16720395780494188.8m^3

vsphere2=(4/3)pi*(308911.52/2)^3
v=15434797482675538.46m^3

So add those up for the total volume.

vtotal=15434797482675538.46+16720395780494188.8
v=32155193263169727.26m^3

Now for density. Considering the size of these things, I don't think crust density is going to cut it. Upper mantle density of 3400kg/m^3, I guess?

m=v*rho
m=32155193263169727.26*3400
m=109327657094777072684kg

Now, the black 44px line is the distance these things crossed at approximately the same time.

(208724/25)44=367354.24m

I'm personally more comfortable going with KE over PE in this case because of how a bunch of the rocks are just left floating, implying some TK or whatever. If you disagree, feel free to comment and I'll make the appropriate edits.

Anyway, those rocks crossed that distance in a single frame, and the video runs at 30 frames per second. Our time-frame is then 1/30th of a second.

v=367354.24/(1/30)
v=11020627.2m/s

Now to just plug the mass and velocities into the KE equation.

KE=.5mv^2
KE=.5*109327657094777072684*11020627.2^2
KE=6.64e33J

or about 1.6 yottatons.

...I feel as if I've fucked that up horribly :sanji

Also note that there are obviously far more rocks and I went only with that which was the least work to calc :NOworries

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Papa Nier
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