- #1

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Relevant equations

MV1 + MV2 = M(1+2)V(1+2)

The attempt at a solution

Im not sure what other equations to use. I think possibly [1/2(MVf^2) - 1/2(MVi^2)] + [(MGHf)-(MGHi)] though im not totaly sure about this.

Could someone lead me in the right direction. Im not sure what goes where.