As I was watching football and saw a quarterback get sacked, I was aware of the forces acting on the players at the moment of impact. The quarterback was basically standing still when the other player hit him. Momentum could be observed during the collision. The equation for momentum (p) is p = mv (mass times velocity). The momentum of the defensive tackle was greater than that of the quarterback's because he was moving at a greater velocity, which enabled him to overcome the quarterback's inertia and tackle him.
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