ch 9 hw 1 - Ch9 HW1 f10 Page 1 of 3 WebAssign Ch9 HW1...

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Web Assign Ch9 HW1 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 20.6 / 23 Due : Sunday, November 7, 2010 11:30 PM CST 1. 9.6/12 points Question: MI3 9.2.X.019 Consider a system consisting of three particles: m 1 = 2 kg, 1 = < 10 , -4 , 15 > m/s m 2 = 5 kg, 2 = < -15 , 7 , -4 > m/s m 3 = 5 kg, 3 = < -24 , 37 , 18 > m/s (a) What is the total momentum of this system? tot = kg·m/s (b) What is the velocity of the center of mass of this system? cm = m/s (c) What is the total kinetic energy of this system? K tot = 6533.9 6740 J (d) What is the translational kinetic energy of this system? K trans = 3565.165 3570 J (e) What is the kinetic energy of this system relative to the center of mass? K rel = 3173.335 3170 J One way to calculate K rel is to calculate the velocity of each particle relative to the center of mass, by subtracting the center-of-mass velocity from the particle's actual velocity to get the particle's velocity relative to the center of mass, then calculating the corresponding kinetic energy, then adding up the three relative
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ch 9 hw 1 - Ch9 HW1 f10 Page 1 of 3 WebAssign Ch9 HW1...

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