un muchacho de 65kg y una muchacha de 45kg ambos se encuentran en patines sobre un pista de hielo. el muchacho empuja a la muchacha y ella se mueve hacia el oeste con una velocidad de 3m/s encuentre la velocidad de retroceso del muchacho

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?