[填空题]
An internal explosion breaks rf391o8zlwtath.crxmt hx 8a 6zr4 ;:an object, initially at rest,g/(2nu n3o9 4zdbowa h into two pieces, one of which has 1.5 times the mass of the other. I4oouzb/2nha w3 d9g(nf 7500 J were released in the explosion, how much kinetic energy did each piece acquire? (Let A represent the heavier particle, and B represent the lighter particle. ) KE'$_A$ = J KE$_B$ = J