To solve this problem, it is necessary to apply the concepts related to Newton's second Law as well as to the expression of mass as a function of Volume and Density.
From Newton's second law we know that
F= ma
Where,
m = mass
a = acceleration
At the same time we know that the density is given by,
Our values are given as,
D=0.242 m
Therefore the Force by Weight is
Now the buoyant force acting on the ball is
The value of the Volume of a Sphere can be calculated as,
Normal conditions
Then,
Therefore the Force net is,
Therefore the required Force is 68.218N