CISCEICSE Class 9
Question Papers10
Textbook Solutions19272
Important Solutions16
Question Bank Solutions14679
Concept Notes & Videos193
Syllabus

Archimedes' Principle

Advertisement Remove all ads

Topics

  • Archimedes’ Principle
  • Experiment verification of Archimedes’ Principle

Notes

Archimedes Principle:

Archimedes studied the upthrust acting on a body, when it is completely or partially immersed in a fluid by performing several experiments and then started the following principle known as Archimedes principle.

When a body is partially or wholly immersed in a fluid, it experiences an upthrust equal to the weight of the liquid displaced.

  • Take a piece of stone and tie it to one end of a rubber string or a spring balance.
  • Suspend the stone by holding the balance or the string as shown in Fig. a
  • Note the elongation of the string or the reading on the spring balance due to the weight of the stone.
  • Now, slowly dip the stone in the water in a container as shown in Fig. b
  • What you will observe is that the elongation of the string & the reading of the balance decreases as the stone is gradually dipped into the water.
  • Since the extension decreases once the stone is lowered in water, it means that some force acts on the stone in upward direction. As a result, the net force on the string decreases and hence the elongation also decreases.

Applications of Archimedes principle:

  • It is used in designing ships and submarines.
  • The lactometers and hydrometers used for measuring the purity of a sample of milk and for determining the density of the liquids are based on the principle.
If you would like to contribute notes or other learning material, please submit them using the button below.

Shaalaa.com | (Archimides Principle and numerical

Shaalaa.com


Next video


Shaalaa.com


(Archimides Principle and numerical [00:09:48]
S
Series: series 1
0%


(Archimides Principle and numerical
00:09:48  undefined

Related QuestionsVIEW ALL [19]

With the use of Archimedes' principle, state how you will find relative density of a solid denser than water and insoluble in it. How will you modify your experiments if the solid is soluble in water? 

A solid of density 2700 kgm’ and of volume 0.0015 m3 ¡s completely immersed in alcohol of density 800 kgm’.Calculate:

  1. Weight of solid in SI system.
  2. Upthrust on solid in SI system.
  3. Apparent weight of solid in alcohol.
  4. Will the apparent weight of solid be less or more, if it is immersed completely in brine solution? Give a reason, [g = 10 ms-2]

What fraction of an iceberg of density 910 kgm-3 will be above the surface of sea water of density 1170 kgm-3 ?

A balloon of volume 1000 m3 is filled with a mixture of hydrogen and helium of density 0.32 kgm-3. If the fabric of balloon weighs 40 kgf and the density of cold air is 1.32 kgm-3, find the tension in the tope, which is holding the balloon to ground.

A balloon of volume 800 cm3 is filled with hydrogen gas of density 9 x 10-5 gem-3. If the empty balloon weighs 0.3 gf and density of air is 1.3 x 10-3 gem-3, calculate the lifting power of balloon.

A balloon of volume 120 m3 is filled with hot air, of density 38 kg-3. If the fabric of balloon weighs 12 kg, such that additional equipment of wt. x is attached to it, calculate the magnitude of Density of cold air is 1.30 kgm-3.

The mass of a block made of certain material is 1.35 kg and its volume is 1.5 x 10-3 m3.

  1. Find the density of block.
  2. Will this block float or sink? Give reasons for your answer.

A block of mass 7 kg and volume 0.07 m3 floats in a liquid of density 140 kg/m3. Calculate:

  1. Volume of block above the surface of liquid.
  2. Density of block.
Advertisement Remove all ads
Share
Notifications

Login
Create free account


      Forgot password?
Course
View in app×