Law of conservation of linear momentum:
From the law of conservation of linear momentum, we have:
Block 1, of mass m1, moves across a frictionless surface with speed ui. It collides elastically with block 2, of mass m2, which is at rest (vi = 0). (Figure 1) After the collision, block 1 moves with speed uf, while block 2 moves with speed vf. Assume that m1 > m2, so that after the collision, the two objects move off in the direction of the first object before the collision.
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