Two small charge balls 2nC and 4nC interact with a force of 0.00000144 N. What is the gap between the balls?

2nC and 4nC interact with a force of 0.00000144 N

Explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

more than, less

less than, more