Algodoo

Block (car) attached to spring attached to stick facing off against block (car) with thruster that thrusts too well. Press play, block (car) with thruster let loose, tackles block (car) with spring and stick and wins, doesn't stop, i.e. keeps going, i.e. moves more, i.e. continues, i.e. comes to rest.. (NOT). <--- the issue. Click s to thrust less, AKA not as much, AKA a lower amount, AKA not at the same level, AKA not at all actually because it gets rid of the thruster, e.g. erases it from the face of the Earth, e.g. vaporizes it (1984).