Stop Train Physics Games

Stop Train Physics Games Description :
Stop a runaway train with the strongest tool in your arsenal: physics. A train has started rolling down hill without brakes and is headed straight towards a building filled with cute things. As a resourceful rail yard switchman, you decide to stop the train with a weighted rail car. Will you make the situation better or worse?
Instructions :
Decide the weight of the railway car by holding spacebar. To launch the car, press spacebar.