Which of the following

  • Thread starter Loppyfoot
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  • #1
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Which of the following....

Homework Statement



In a collision between an electron and a hydrogen atom, it is useful to select both objects as the system because:

A. The total momentum of the system does not change during the collision
B. The forces the objects exert on each other are internal to the system and don't change the total momentum of the system
C. During the time interval just before to just after the collision, external forces are negligible
D. The kinetic energy of a two-object system is nearly zero
E. The sum of the final kinetic energies must equal the sum of the initial kinetic energies for a two-object system



I am confused about this one. any ideas?
 

Answers and Replies

  • #2
137
1


I would say A.
 

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