Tag: force and pressure

Questions Related to force and pressure

Fluids include

a) Solids    
b) Liquids  
c) Gases

physics force and pressure pressure in fluids pressure in liquids introduction to pressure

  1. a and b

  2. b and c

  3. a and c

  4. All the above

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Correct Option: B
Explanation:

A fluid is a substance that has no fixed shape and yields easily to external pressure; a gas or  a liquid, or, which can easily flow.

It is due to this property of variation of pressure along a fluid that it exerts a buoyant force on a body placed inside it. 

What is the difference between the pressure on the water surface and that on the bottom?

physics force and pressure pressure in fluids pressure in liquids introduction to pressure

  1. $\rho gh$

  2. $\frac{\rho g}{h}$

  3. Zero

  4. Infinity

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Correct Option: A
Explanation:

The pressure at the bottom of the water surface is

$P=\dfrac{F}{A}=\dfrac{W}{A}=\dfrac{Ah\rho g}{A}=\rho gh$