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Mechanical Properties of Fluids

Buoyancy

A ping pong ball has a volume V and density {1}{7} th that of

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A ping pong ball has a volume $V$ and density $\frac{1}{7}$ th that of liquid. What force would be required to hold it completely submerged under liquid?

Name: Video solution 1: A ping pong ball has a volume V and density 71 th that of liquid. What force would be required to hold it completely submerged under liquid?
Uploaded: 2022-11-28T12:45:53.000Z
Duration: 7 min
Description: Video solution 1: A ping pong ball has a volume V and density 71 th that of liquid. What force would be required to hold it completely submerged under liquid?

Views: 5,676 students

Updated on: Nov 28, 2022

Book:

Physics Galaxy Mechanics Vol 1 (Ashish Arora)

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Sofia Discussed

A ping pong ball has a volume

V

and density

\frac{1}{7}

th that of liquid. What force would be required to hold it completely submerged under liquid?

12 mins ago

Discuss this question LIVE

12 mins ago

Text solutionVerified

Let the Volume be

V

and density be

p_{ball} = \frac{ρ}{7}

where the density of liquid is

ρ

.
The weight of ball is

W = V ρ_{ball} g = \frac{V ρ g}{7}

Buoyancy force when it is completely submerge,

F = V ρ g

Net force is

f = F - W = V ρ g - \frac{V ρ g}{7}

f = \frac{6 V p g}{7}

the direction of

f

should be downward.

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Question Text	A ping pong ball has a volume $V$ and density $\frac{1}{7}$ th that of liquid. What force would be required to hold it completely submerged under liquid?
Updated On	Nov 28, 2022
Topic	Mechanical Properties of Fluids
Subject	Physics
Class	Class 11
Answer Type	Text solution:1 Video solution: 1
Upvotes	281
Avg. Video Duration	7 min

A ping pong ball has a volume $V$ and density $\frac{1}{7}$ th that of liquid. What force would be required to hold it completely submerged under liquid?

Text solutionVerified

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