Nathan plays middle linebacker for South's varsity football team. In a game against cross-town rival North, he delivered a hit to North's 82-kg running back Ryan, changing his eastward velocity of 5.6 m/s into a westward velocity of 2.5 m/s. What is the change in Ryan's momentum?

Answer 1

The change in Ryan's velocity is the difference between his eastward velocity and westward velocity:
Δv = 2.5 m/s - (-5.6 m/s) = 8.1 m/s

The change in momentum is the product of Ryan's mass and the change in velocity:
Δp = m * Δv
Δp = 82 kg * 8.1 m/s
Δp = 665.4 kg m/s

Therefore, the change in Ryan's momentum is 665.4 kg m/s.