An ice skater with a mass of 80 kg pushes off against a second skater with a mass of 32 kg. Bothskaters are initially at rest.a. What is the total momentum of the system before they push off?b. What is the total momentum of the system after they push off?c. Which skater has more momentum right after the push off?d. If the larger skater moves off with a speed of 3 m/s, what is the corresponding speed ofthe smaller skater?e. Which skater has more kinetic energy right after the push off?

Answered: An ice skater with a mass of 80 kg…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter6: Momentum And Collisions

Section: Chapter Questions

Problem 3P: A pitcher claims he can throw a 0.145-kg baseball with as much momentum as a 3.00-kg bullet moving...

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a man of mass m1 = 70.0 kg is skating at v1 = 8.00 m/s behind his wife of mass m2 = 50.0 kg, who is skating at v2 = 4.00 m/s. Instead of passing her, he inadvertently collides with her. He grabs her around the waist, and they maintain their balance. (a) Sketch the problem with before-and-after diagrams, representing the skaters as blocks. (b) Is the collision best described as elastic, inelastic, or perfectly inelastic? Why? (c) Write the general equation for conservation of momentum in terms of m1, v1, m2, v2, and final velocity vf. (d) Solve the momentum equation for vf. (e) Substitute values, obtaining the numerical value for vf, their speed after the collision.

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