What is the formula for calculating kinetic energy?

K.E = 1/2 MV^2

Explanation:

K.E = Kinetic Energy

M = Mass

V = Velocity

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

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete