Two identical twins hold on to a rope, one at each end, on a smooth, frictionless ice surface. They skate in a circle about the center of the rope (the center of mass of the two-body system) and perpendicular to the ice. The mass of each twin is 77.0 kg. The rope of negligible mass is 3.0 m long and they move at a speed of 5.70 m/s. center of mass (a) What is the magnitude, in kg m²/s, of the angular momentum of the system comprised of the two twins? kg-m²/s (b) They now pull on the rope and move closer to each other so that the rope between them is now half as long. Determine the speed, in m/s, with which they move now. m/s (c) The two twins have to do work in order to move closer to each other. How much work, in joules, did they do? J

Two identical twins hold on to a rope, one at each end, on a smooth, frictionless ice surface. They skate in a circle about the center of the rope (the center of mass of the two-body system) and perpendicular to the ice. The mass of each twin is 77.0 kg. The rope of negligible mass is 3.0 m long and they move at a speed of 5.70 m/s. center of mass (a) What is the magnitude, in kg m²/s, of the angular momentum of the system comprised of the two twins? kg-m²/s (b) They now pull on the rope and move closer to each other so that the rope between them is now half as long. Determine the speed, in m/s, with which they move now. m/s (c) The two twins have to do work in order to move closer to each other. How much work, in joules, did they do? J

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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