Answer: Two balls are hung from cords. The first ball, of
Chapter 9, Problem 20(choose chapter or problem)
Two balls are hung from cords. The first ball, of mass 1.0 kg,is pulled to the side and released, reaching a speed of 2.0 mis atthe bottom of its arc. Then, asshown in Figure Q9.20, it hitsand sticks to another ball. Thespeed of the pair just after thecollision is 1.2 mis. What isthe mass of the second ball?A. 0.67 kgB. 2.0 kgC. 1.7 kg D. 1.0 kg
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