An object with charge qo = 1.5μC and mass 0.7 g starts from rest at the +6V equipotential line. Calculate its change in potential energy and speed when it reaches the +2V line.

Answer 1

The acquired kinetic energy equals the potential energy drop, which equals the charge times the voltage decrease. That will be in Joules.

Then use Kinetic Energy = (1/2) M V^2 to solve for V