Kolibear,
That is correct, however, i don't remember them spinning the bomb on the scaled down setup... which could mean 2 things a) they would have to fire it at an even slower speed to mimic the cushioning of the spinning or b) would firing at a high velocity make the bounce shallower hence less impact?? any physicists out there????????????????????????????? A level physics hasn't really helped me!! C
Colleague gave a ray of light..... the water has a specific surface tension/viscosity, if you scale the system down by say 25% that would mean that water would effectively become 400X more "sticky" hence the projectile would have to be fired at 400X the actual speed to counteract the viscosity of the water.... any better??
