Problem 4d

Given information

Given:-

sphere of radius 0.4m

density of water is 

Step-by-step explanation

This is the same work required to lift a sphere of that radius entirely submerged the length of its diameter against the gravitational field.

Thus, the weight of the sphere is 

now, to get the force density, multiply this quantity by the acceleration due to gravity.

finally, this entire weight is to be lifter one diameter, 

so, the done work is

 Joules

or