Tag: statics and dynamics of fluid (liquid and gas)

Questions Related to statics and dynamics of fluid (liquid and gas)

Force acting per unit area is

  1. Acceleration

  2. Pressure

  3. Velocity 

  4. None


Correct Option: B
Explanation:

Pressure is defined as force per unit area. The standard unit for pressure is the Pascal, which is a Newton per square meter.

$P=\dfrac{F}{A}$

For an object sitting on a surface, the force pressing on the surface is the weight of the object, but in different orientations it might have a different area in contact with the surface and therefore exert a different pressure.

The pressure of the fluid acting sideways is known as its lateral pressure

  1. True

  2. False


Correct Option: A
Explanation:

pressure acting sideways is known as lateral pressure .

so option (A) is correct

Pressure is equal to

  1. $\dfrac{Force}{Area}$

  2. $\dfrac{Area}{Force}$

  3. $\dfrac{Thrust}{Area}$

  4. $\dfrac{Area}{Time}$


Correct Option: A
Explanation:

Pressure can be defined as the force per unit area which can be written as $\dfrac{Force}{Area}$.

Fill in the blank.

Pressure is a __________ quantity.

  1. Scalar

  2. Vector

  3. both A and B

  4. neither A nor B


Correct Option: A
Explanation:

Although Force and Area, both are vector quantities, pressure is a scalar quantity.

Fill in the blank.

Pressure affects ________ substances.

  1. solid

  2. liquid

  3. gaseous

  4. solid, liquid and gaseous


Correct Option: D
Explanation:

Pressure affects substances in al the state whether it is liquid, solid or gaseous.

Pressure = ?

  1. force $\times$ area

  2. force / area

  3. mass / area

  4. area / force


Correct Option: B
Explanation:

Pressure is the force acting on a unit area of a surface it can be written as pressure  $= \dfrac{force}{area}$

Fill in the blank.

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

  1. atmospheric pressure

  2. pressure

  3. muscular force

  4. none of these


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

  1. normal to the surface

  2. inclined to the surface

  3. parallel to the surface

  4. at any arbitrary direction on the surface


Correct Option: A
Explanation:

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