A 0.400-kg blue bead slides on a frictionless, curved wire, starting from rest at point A in the Fig

A 0.400-kg blue bead slides on a frictionless, curved wire, starting from rest at point A in the Figure, where h = 1.50 m. At point B, the bead collides elastically with a 0.600-kg green bead at rest. Find the maximum height the green bead rises as it moves up the wire.

[camcamstegz]

I tried this problem, but instead of using the shortcut equation i used pi=pf by the law of conservation of momentum. However, I'm not getting the correct answer. Why is this?

[kishpat]

where does that 2m/m1+m2 formula come from?

[bucketrance]

looking for that equation for 3 hours thank 2:57

[Garen]

Lol I came to see how you drive that formula but u just used the shortcut :(
Great vid regardless, ur channel is amazing