Question

A point particle of charge 2.5 nC and mass 3.25x10^-3 kg is in uniform electric field directed to the right.It is released from rest and moves to the right .After it was traveled 12.0cm,it's speed is 25m/s.Find the

a)work done on the particle

b) change in the electric potential energy of the particle and

c) magnitude of the electric field.

Answer 1

a)

$W=\frac{mv^2}2=1.02~J,$

b)

$U=\frac Wq=4.06~MV,$

c)

$E=\frac Ud=33.85~\frac{MN}C.$