[填空题]
A 25-g bullet strikes and becomes embedde2eb6bxkjy/ 4w/* mpsa, )yfzbd in a 1.35-kg block of wood placed o2h+8bs.q:x(mf m bkrrn a horizontal su rsm.28b:x+q(k mbf hrrface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.25, and the impact drives the block a distance of 9.5 m before it comes to rest, what was the muzzle speed of the bullet? m/s
