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# particle collisions watch

1. If two hard spheres collide with each other of masses m1 and m2 respectively with u2=0 and u1 in the positive x direction.

Q, Resolve the momentum equation parallel and perpendicular to to the incident beam direction, show that alpha is related to the speed v2 of the recoiling target particle by:

cos (alpha) = (m2*v2)/[2*eta*u1] where eta=(m1+m2)/(m1*m2)

alpha is the angle between u1 and the line connecting the centre of the two spheres.

any ideas?
2. (Original post by latentcorpse)
If two hard spheres collide with each other of masses m1 and m2 respectively with u2=0 and u1 in the positive x direction.

Q, Resolve the momentum equation parallel and perpendicular to to the incident beam direction, show that alpha is related to the speed v2 of the recoiling target particle by:

cos (alpha) = (m2*v2)/[2*eta*u1] where eta=(m1+m2)/(m1*m2)

alpha is the angle between u1 and the line connecting the centre of the two spheres.

any ideas?

Draw a diagram?

I don;t think I;ve quite understood what all the letters/numbers are.

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