Halliday, Fundamentals of Physics, 10e Calculus based Physics for Sclentists & E
ID: 1628394 • Letter: H
Question
Halliday, Fundamentals of Physics, 10e Calculus based Physics for Sclentists & Engineers (PHYS 2112 Assignment Gradebook ORION ent BACK Chapter 13, Problem 038 Your answer is partially correct. Try again. In deep space, sphere A of mass 79 kg is located at the origin of an x axis and sphere 8 of mass 110 kg is located on the axis at x 5.2 . Sphere B is released from rest while sphere A is held at the origin. (a) What is the gravitational potential energy of the two-sphere system just as 5 is released? (b) What is the kinetic energy of B when it has moved 3.6 m toward A? (a) N (b) N Click if you would like to show Work for this question: Open Show Work 1.11E-7 1.82E-7 LINK TO TEXT Question Attempts: 3 of 10 used SAVE FOR LATER BMIT ANSWER opyright O 2000-2017 by John Wiley & Sons, Inc. or related companies. Al rights reserved. cy 2000-2017 ]ohn Wiley & Sons, Inc. All Rights Resorved. A Division of lahn Wiley & Sans, Inc. Version 4.22Explanation / Answer
(a) gravitational potential energy= U = -Gm1m2/r
= (-6.67 * 10-11 m3/kg s2)(79kg)(110 kg)/(5.2m) =
U=-1.11 * 10-7 J
(b) Unew= -Gm1m2/r
new distance= 5.2-3.6=1.6 m
= (-6.67 * 10-11 m3/kg s2)(79kg)(110 kg)/(1.6m) =
U2=-3.36 * 10-7 J
kinetic energy=-1.11x10-7-(-3.36x10-7)
kinetic energy=2.25x10-7 J
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