Question

Two balls undergo inelastic collision. The y-momentum after the collision is 98 kilogram meters/second, and the x-momentum after the collision is 100 kilogram meters/second. What is the magnitude of the resultant momentum after the collision?

Answer 1

p=sqrt{p(x)² +p(y)²} =
= sqrt(98² +100²)=140 kg•m/s

Answer 2

v = Sqrt(v1^2 + v2^2)
v = sqrt(98^2 + 100^2)
V = 140.01
V = 1.4 * 10^2