
#1
Jan2913, 06:36 PM

P: 4

1. The problem statement, all variables and given/known data
A moving particle encounters an external electric field that decreases its kinetic energy from 8560 eV to 6770 eV as the particle moves from position A to position B. The electric potential at A is 50.5 V, and the electric potential at B is +25.9 V. Determine the charge of the particle. Include the algebraic sign (+ or −) with your answer. 2. Relevant equations V=EPE/q, EPE=qEx=KE 3. The attempt at a solution ΔKE/ΔV=q 1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution 



#2
Jan2913, 07:20 PM

Mentor
P: 11,415

Did you have a particular question about the problem? You seem to be on the right track with your attempt. 



#3
Jan2913, 07:23 PM

P: 4

Yeah. I'm trying that formula, but it keeps telling me my answer is incorrect. I'm not sure what I'm doing wrong. When I attempt the practice version it is trying to tell me the answer is times 10^18 and nothing I have in that formula would give me a number that small. Are my formulas incorrect?




#4
Jan2913, 07:44 PM

Homework
Sci Advisor
HW Helper
Thanks ∞
P: 9,152

Find q for a moving particle 



#5
Jan2913, 07:59 PM

P: 4

Figured it out. Thanks!



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