What would be the overall outcome of starting the procedures with cold water instead of room temperature water

Electrolysis will be slowed.

Explanation:

Cold water is more dense and therefore it can slow down electrolysis process. Efficiency of electrolysis variate with change in temperature of water.The efficiency of electrolysis increases with increase in temperature of the water. If cold water is used then the process will be slowed down.

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