I am trying to determine the formula, (which is momentum?) of 2 objects hitting each other head-on. momentum = mass x velocity (2,000 = 200lbs x 10 mph) times 2 for 4,000. If this is correct, then if one of the masses intersected at say a 45 degree angle, what would the formula be for the force (momentum)? As you can see I am not a physics kind of guy. I am looking for a practical formula for 2 football players colliding, one at an angle, and how it would compare to a straight on collision. My hope is that the one from the angle could achieve equal or more force with less mass but at a higher velocity then a straight on collision.