WileyPEUS edugen.wileyplus.com/edugen/lti/main.uni Halliday, Fundamentals of Phy

Question

WileyPEUS edugen.wileyplus.com/edugen/lti/main.uni Halliday, Fundamentals of Physics, 10e PRINTER VERSTON BACK Chapter 13, Problem 038 In deep space, sphere A of mass 91 ko is located at the oriain of an x axis and sphere B of mass 4B kg is located on the axis at x -2.2 m. Sphere B is rele held at the origin. (a) what is the oravitational potential energy of the two-sphere svstem just as B is released? (b) what is the kinetic energy of B when it has moved 1.5 m toward A? (a) Number (b) Number ased from rest while sphere A is Units Units SHOW HINT LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM MATH HELD Question Attempts: 0 of 6 used SAVE FOR LATER SUSET ANSWER

Explanation / Answer

a) Ui = -G mA mB / r1

= (-6.67 * 10-11 * 91 * 48) / (2.2)

Gravitational PE = -1.32 * 10-7 J

b) Uf = -G mA mB / r1 - r2

= (-6.67 * 10-11 * 91 * 48) / (2.2 - 1.5) = -4.16 * 10-7 J

Kf = - (Uf - Ui)

= - (-4.16 * 10-7 - (-1.32 * 10-7))

kinetic energy = 2.84 * 10-7 J

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