Question

a table-tennis ball has a diameter of 3.80 cm and average den- sity of 0.084 0 g/cm3 . what force is required to hold it com- pletely submerged under water?

Answer 1

The required force is required to hold it com- pletely submerged under water is 0.257 newton.

What is a substance's density at atmospheric pressure?

Densities that are typical for different materials under atmospheric pressure. The mass per unit volume is the definition of density. It is an intense property, with mass divided by volume serving as its mathematical definition.

What is the name of the buoyant force?

Upthrust is another name for the buoyant or upward force that an item experiencing partial or complete submersion in a fluid feels. A body or item immersed partially or completely in a fluid seems lighter due to the buoyant force or upthrust.

According to question:

We have.,

diameter of ball =  3.80 cm, density of ball ρ(b) =0.084 0 g/cm^3

density of water (ρ(w)) = 1 ,

By using formula,

F = Vg(ρ(w) - ρ(b) )

F = $\frac{4}{3}$ (πr^3)(9.8)(1 - 0.084)

F = 0.257 newton

Thus, required force is 0.257 newton.

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