KK>> 2. Sun stopping, yes, I believe that it happened.
KN> This is total unadulterated ignorant BULLSHIT of the KN> first order! For the Sun to stop in the sky, the KN> Earth would have to stop rotating on it's axis, AND KN> THEN would have to start rotating again.
CJH> Has anyone calculated the amount of force required to CJH> cancel the Earth's rotation and restart it?
Hello. Will I do?
The gravitational acceleration which glues us to the Earth has a value of 10^3 cm/sec^2. A decelertion of a=10^2g =10 cm/sec^2 is nearly unnoticeable. How much time, ç, would the Earth take to stop its rotation if the resulting deceleration were unnoticeable? Earth's equatorial angular velocity is ê=2ã/P=7.3x10^5 radians/sec; the equatorial linear velocity is Rê=0.46km/sec. Thus, ç=Rê/a=4600 seconds or slightly over an hour. But... The specific energy of the earth's rotation is E=1/2Iê/M~=+1/5(rê)^2~=4X10^8 ERG/gm. Where I= the Earth's principal moment of inertia. With a typical specific heat capacity of Csubp~=8x10^6 ERG/gm/deg., the stopping and restarting of the Earth in one day would have imparted and average temperature increment of delT=2E/Csubp = 117 Kelvins; enough to raise the Earth's ambient temperature above the normal boiling point of water. It would have been worse near the surface and at low latitudes; with v=Rê, delT=v^2/Csubp = 240 Kelvins. It would be doubtful that the local populace would have not taken notice of the oceans boiling away into space.So there.



