Physics 2

[ImagineDragons]

Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the collision? Assume the collision to be perfectly elastic.

[Calibax]

m1u1 + m2u2 = m1v1 + m2v2.

[ImagineDragons]

wait mu?

[Calibax]

m1 is the mass of ball A
m2 is the mass of ball B
U1 is the initial velocity of ball A
U2 is the initial velocity of ball B
V1 is the final velocity of ball A
V2 is the final velocity of ball B

[ImagineDragons]

Thank you SOOO MUCH, I figured out it was 30!