An ice skater with a mass of 80kg pushes off against a, Ask an Expert

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An ice skater with a mass of 80kg pushes off against a second skater with a mass of 32kg. both skaters are initially at rest.

a. what is the total momentum of the system after the push off?
b. if the larger skater moves off with a speed of 3m/s, what is the corresponding speed of the smaller skater?

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