At Sufficient Velocity

If any phrase best summarizes the mindset of the Spacebattles community, especially those who frequent the Vs. Debates forum, it would be, "one, at sufficient velocity."
This phrase is typically used in response to questions in the format, "How many X would it take to Y?"
==Sufficient Velocity==
Sufficient Velocity is the velocity at which a given projectile accomplishes a given feat. For example, the sufficient velocity for a grapefruit to destroy Colossus of the X-Men is very, very, very high. However, the Sufficient Velocity for a wrecking ball to destroy a tree is very, very low.
The way one arrives at a figure for Sufficient Velocity is simple.
#Determine the amount of kinetic energy needed to accomplish the feat in question.
#Determine the mass of the projectile in question.
#Using the formula E=(1/2)mv^2, solve for v.  If v is very large, use the relativistic formula E = mc^2(1/sqrt(1-(v^2/c^2))-1).  To save time, ask wolframalpha (edit the mass and energy to suit your need).
#V is your sufficient velocity.
Sufficient Velocity can be arbitrarily large. It is frequently expressed in terms of a percentage of light speed.
Also the name of a splinter forum of SB.
==Examples==
Category:Spacebattles Memes
Category:Vs. Debates
Category:Calculations