When a liquid is cooled, the kinetic energy of the particles. The force of attraction between the particles, the space between the particles

When a liquid is cooled,the kinetic energy of the particles decreases. The force of attraction between the particles increases, the space between the particles decreases.

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

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this