work done by external agent to move a negatively charged particleof mass 2mg from rest away from a fixed positive charge from point p to q is 5mJ,potential energy of the system increases by 4mJ in the process.find the speed of the particle at point q

Asked by Akshansh prasad | 4th Jun, 2013, 08:43: AM

Expert Answer:

potential energy stored, V = 4mJ
 
total energy = 5mJ = V + K
K = kinetic energy = E - V = 1mJ
 
let veelocity be v
thus K = 1/2mv2
thus we can calculate v

Answered by  | 4th Jun, 2013, 11:55: PM

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