The kinetic energy is Mass * Velocity * Velocity / 2.
Mp * Vp * Vp/2 = 32 * Mvw * Vvw * Vvw/2.
solving for Vp yields
Vp=100 Mph * sqrt(32* 2000/20) ~= 5657 mph ~= 8300 feet/second.
No wonder it smokes.
(Yes I know pounds is not a mass unit, but since only the ratio counts it doesn't matter what units are used, as long as they are the same for both masses)
I’ll wait for the laser version, thank you.