Does someone knows how to do this exercise? With the formula it would be more than helpful!!! Need it as soon as possible How long will it take for a ball to move from rest to 23 km/h with an acceleration of 2.2 m/s^2

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9