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NNF1024 NNF1024
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2 months ago

A ball bearing rolls along a smooth horizontal tabletop and crashes head-on into a second, stationary ball bearing of half its mass. If both ball bearings roll in the x-direction only (either positive or negative) and the initially stationary ball is observed to have a velocity of +2.4 m/s after the collision, what was the initial speed of the first ball bearing? Assume the collision is elastic.



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7.2 m/s



3.6 m/s



1.8 m/s

Textbook 
College Physics

College Physics


Edition: 5th
Author:
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strawberry8971strawberry8971
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NNF1024 Author
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You make an excellent tutor!
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Smart ... Thanks!
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