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## Homework Statement

Two hockey players push each other on the ice. The 86-kg skater moves with a velocity of 2.4 m/s. Find the recoil velocity of the 79-kg skater

## Homework Equations

idk

## The Attempt at a Solution

86*2.4=79*v2 v2=2.613 m/s

Second problem

## Homework Statement

A child drops a 5-g marble on the floor. The marble hits the floor with a velocity of -3.13m/s and rebounds with a velocity of 1.87 m/s. What is the marble's change in momentum? What impulse acts on the marble? What is the force of impact if the marble is in contact with the floor for a time of 2.5 x 10^-3s?

## Homework Equations

idk

## The Attempt at a Solution

A) (5*1.87)-(5*-3.13)

B)

C)(5*-3.13)/(2.5*10^-3)=-6260N