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Pick out the scalar quantity-

Pick out the scalar quantity- Correct Answer pressure

CONCEPT:

  • Scalar quantity: The physical quantity with magnitude and no direction is called a scalar.
    • some physical quantities can be described just by their numerical value (with their respective units) without directions (they don't have any direction).
    • The addition of these physical quantities follows the simple rules of algebra. Here, only their magnitudes are added. 
    • The force is a vector quantity
      • To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction.
  • Velocity: It is the rate of change in the distance travelled by an object in a particular direction. It is a vector quantity.
  • Acceleration: ​It is a vector quantity because it has both magnitude and direction. 
    • when an object has positive acceleration, the acceleration occurs in the same direction as the movement of the object.
  • Pressure: It is a scalar quantity, It has a magnitude but no direction associated with it. 
    • Pressure acts in all directions at a point inside a gas.
    • At a surface of a gas, the pressure force acts perpendicular to the surface.

EXPLANATION: 

  • Pressure is a scalar quantity. Hence option 2 is the answer.

Additional Information

  • Vector: The physical quantity having both magnitudes as well as direction is called a vector.
    • Example- Force, displacements, etc

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