Below is a diagram of two identical particles, X and Y which have masses mX and mY respectively. Particle X collides into Particle Y with a velocity of v0 and they move off in different directions. Particle X moves off with a velocity of v1 at an angle of θ1 to the original direction of motion. Particle Y moves off with a velocity of v2 at angle θ2.
Which one of the following equations is correct?
mXv1cosθ1 = mYv2cosθ2
mXv0 = mXv1sinθ1 − mYv2sinθ2
(mX + mY)v0 = mXv1cosθ1 + mYv2cosθ2
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