When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum.

Introduction Did it ever occur to you that tennis, bowling and shopping carts bumping into each other all involve collisions? It is fascinating how just a few rules of physics can predict the ...

is simulating these collisions and gravitational waves in more detail to reveal these non-linear effects. "Nonlinear effects are what happens when waves on the beach crest and crash," California ...