Agirl is holding a ball with a diameter of 4.10 cm and average density of 0.0841 g/cm3 under water. determine the force (in n) needed to hold it completely submerged.

The force needed to hold the ball completely submerged is 0.323N

Explanation:

In this question we have given,

diameter of ball= 4.1 cm

Therefore, radius of ball,

density of ball,

density of water,

we know that, volume of sphere is given by following formula,

we know that,

Therefore,

or

..............(1)

Here,

Put values of density, volume and gravity in equation (1)

.

Force=0.323N

the force needed to hold the ball completely submerged is 0.323N

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