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Homework help

  • Thread starter srhly
  • Start date
17
0
Particles A (of mass m and charge Q) and B (of mass m and charge 5 Q) are released from rest with the distance between them equal to 0.4939 m. If Q= 31 uC, what is the kinetic energy of particle B at the instant when the particles are 2.4939 m apart? Answer in units of J.

I know that the initial kinetic energy is zero since the particles start from rest. I also know that you can relate the change in electrical potential to kinetic energy. I'm a little confused on how to set it up though.
 

Answers and Replies

Tide
Science Advisor
Homework Helper
3,076
0
I think the piece of information you're missing is that momentum is conserved in the process.
 

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