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प्रश्न
Why is the tip of an allpin made sharp?
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उत्तर
The tip of an allpin is made sharp so that large pressure is exerted at the sharp end and it can be driven into with less effort.
संबंधित प्रश्न
Explain the following statement:
Sleepers are laid below the rails.
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
(i) The volume of the body,
(ii) The loss in weight of the body, and
(iii) The upthrust on the body.
State the assumption made in part (i).
Two identical pieces, one of ice (density = 900kg per meter cube) and other wood (density = 300kg per meter cube) float on water.
- Which of the two will have more volume submerged inside water
- Which of two will experience more upthrust due to water.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
Select the correct option:
When a body is wholly or partially immersed in a liquid, it experiences a buoyant force which is equal to:
What do you understand by the term “Buoyancy”.
Complete the analogy.
Downward force : Weight :: Upward force offered by liquid : ______
