Tag: pressure dependence on force and area

Questions Related to pressure dependence on force and area

Fill in the blank.

The force acting on a unit area of a surface is called____.

physics statics and dynamics of fluid (liquid and gas) pressure in liquids and gases pressure dependence on force and area concept of pressure

  1. atmospheric pressure

  2. pressure

  3. muscular force

  4. none of these

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Correct Option: B
Explanation:

Pressure is force acting on a unit area of a surface when force applied on object in a particular area of object exert pressure on it.

A force is called thrust when it acts

physics statics and dynamics of fluid (liquid and gas) pressure in liquids and gases pressure dependence on force and area concept of pressure

  1. normal to the surface

  2. inclined to the surface

  3. parallel to the surface

  4. at any arbitrary direction on the surface

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Correct Option: A
Explanation:

When a force acts vertically downwards or normal to the surface under consideration, it is called thrust.

Thrust is which type of force:

physics floatation pressure in liquids and gases pressure dependence on force and area concept of pressure

  1. Parallel

  2. Perpendicular

  3. normal

  4. Both b and c

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Correct Option: D
Explanation:

The force which is perpendicular to the surface on which it is acted is called a thrust.

A perpendicular force is also called 'normal' to that surface.
Hence correct answer is option D.

Which Newton's laws describe thrust?

physics floatation pressure in liquids and gases pressure dependence on force and area concept of pressure

  1. First and second

  2. second and third

  3. only second

  4. first and third

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Correct Option: B
Explanation:

Thrust is a reaction force described quantitatively by Newton's second and third laws. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system.