Answered: A 28000-kg open railroad car, initially…

A 28000-kg open railroad car, initially coasting at 0.775 m/s with negligible friction, passes under a hopper that dumps 110000 kg of scrap metal into it.

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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A 69.0-kg boy and his 37.0-kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backward with a velocity 3.30 m/s toward the west. Ignore friction. (a) Describe the subsequent motion of the girl. She will move west, in the same direction as her brother, with a speed 3.30 m/s. She will move east, directly away from her brother with a speed 7.8 m/s. She will move east, directly away from her brother with a speed 6.15 m/s. She will move east, directly away from her brother with a speed 1.65 m/s. (b) How much potential energy in the girl's body is converted into mechanical energy of the boy-girl system? J (c) Is the momentum of the boy-girl system conserved in the pushing-apart process? Yes or No
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