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Homework Help
Introductory Physics Homework Help
Momentum, Impulse and Collisions
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[QUOTE="xRohan1, post: 5055016, member: 548717"] [h2]Homework Statement [/h2] 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 [h2]Homework Equations[/h2] idk [h2]The Attempt at a Solution[/h2] 86*2.4=79*v2 v2=2.613 m/s Second problem [h2]Homework Statement [/h2] 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? [h2]Homework Equations[/h2] idk [h2]The Attempt at a Solution[/h2] A) (5*1.87)-(5*-3.13) B) C)(5*-3.13)/(2.5*10^-3)=-6260N [/QUOTE]
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