What is the mass of an object that weighs 500 newtons on earth?
a. 0 kg
b. 51 kg
c. 512 kg
d. 4900 kg

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

f=ma newton

f=100x2.5=250n