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ICSE Class 9 Pressure in Fluids and Atmospheric Pressure — practice questions

Explore 21 free Pressure in Fluids and Atmospheric Pressure questions in ICSE Class 9 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Pressure in Fluids and Atmospheric Pressure questions and exercises with answers

Showing questions 1–21 of 21.

Sort what raises or lowers pressureRead the answer and worked solution →Thrust is defined asRead the answer and worked solution →Pressure is defined asRead the answer and worked solution →The SI unit of pressure is theRead the answer and worked solution →Pressure exerted by a liquid column of height h, density rho and gravity g isRead the answer and worked solution →Pressure exerted by a liquid does not depend onRead the answer and worked solution →The base of a dam is made broader than the top becauseRead the answer and worked solution →A diver wears a special suit because at great depthRead the answer and worked solution →Pascal's law states that pressure applied at any point of an enclosed liquidRead the answer and worked solution →Hydraulic brakes and lifts work onRead the answer and worked solution →Atmospheric pressure at sea level is aboutRead the answer and worked solution →Pressure in a fluid at the same depth in a connected vessel isRead the answer and worked solution →Pressure at the bottom of a 4 m deep water column (rho = 1000 kg/m^3, g = 10 m/s^2) isRead the answer and worked solution →Total pressure at a depth h in a liquid open to the atmosphere isRead the answer and worked solution →Atmospheric pressure decreases with altitude becauseRead the answer and worked solution →An altimeter in an aircraft measuresRead the answer and worked solution →A weather forecast uses changes in atmospheric pressure toRead the answer and worked solution →Pressure of a column of mercury 76 cm tall at sea level corresponds toRead the answer and worked solution →Two liquids X and Y have densities 800 and 1200 kg/m^3. At depth 2 m the pressures are P_X and P_Y. The ratio P_X : P_Y isRead the answer and worked solution →A hydraulic press has small piston area 0.01 m^2 and large piston area 0.2 m^2. A force of 50 N on the small piston gives a force on the large piston ofRead the answer and worked solution →Force on a window of area 0.5 m^2 at depth 10 m in water (rho = 1000, g = 10) isRead the answer and worked solution →

Worked practice questions

Sort what raises or lowers pressure

Read exercise and reference answers
Items
  1. Item
    Sharper knife edge
    Answer
    left
  2. Item
    Smaller contact area
    Answer
    left
  3. Item
    Greater applied force
    Answer
    left
  4. Item
    Snowshoes' large area
    Answer
    right
  5. Item
    Tank treads vs car tyres
    Answer
    right
  6. Item
    Wider straps on heavy bag
    Answer
    right
Categories
Left
Increases
Right
Decreases
Instructions
Swipe each case left for Increases or right for Decreases, for what it does to pressure.

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Thrust is defined as

  1. The force acting normally on a surface
  2. The pressure acting on a surface
  3. The weight of air on a surface
  4. The energy stored in a surface
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Correct answer: A. The force acting normally on a surface

1. Section 4.1 defines thrust. 2. A force can act in any direction on a surface. 3. Force normal (perpendicular) to the surface is called thrust. 4. So option A is correct. _Source: Selina Concise Physics Class 9, Ch 4 Pressure in Fluids and Atmospheric Pressure (Mistral OCR'd PDF), section 4.1_

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Pressure is defined as

  1. Thrust times area of the surface
  2. Thrust acting per unit area
  3. Mass divided by volume of the body
  4. Force times distance moved
Show answer and solution

Correct answer: B. Thrust acting per unit area

1. Pressure compares the effect of thrust on different areas. 2. Smaller area concentrates the thrust and gives more pressure. 3. Mathematically pressure = thrust / area. 4. So option A is correct. _Source: Selina Concise Physics Class 9, Ch 4 Pressure in Fluids and Atmospheric Pressure (Mistral OCR'd PDF), section 4.1_

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