It appeared to be much more than 9.7 when I used 900.
I did this:
package loltest{function fxdtsbrick::radiusimpulse(%t,%r,%x,%z,%c){Parent::radiusimpulse(%t,%r,%x,%z,%c);talk(localclientconnection.player.
getVelocity());}}; activatePackage(loltest);
in the console.
I set the x/y force to 0, and the z force to 900.
It gave me 0 0 9.7962 when standing ontop of it and clicking it.