College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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An object with mass m1 = 3.00 kg is moving along the positive x axis with a speed v1i = 2 m/s straight towards two objects with masses m2 = 2.00 kg and m3 = 4.00 kg, which are initially at rest. When they collide, object 1 comes to rest and object 2 moves away with a speed of v2f = 1.5 m/s at an angle of 50 degrees above the x axis. What is the direction of the velocity of the center of mass of the system comprised of all three objects after the collision?
A) Along the x axis
B) A an angle of 50 degrees above the x axis
C) At an angle of 50 degrees below the x axis
D) At an angle > 0 degrees and <50 degrees above the x axis
E) At an angle>0 degrees and <50 degrees below the x axis
The correct answer is A but I am confused why it is A, if you could explain the justification as to why the answer is option A.
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