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Select the scalar quantity.

Select the scalar quantity. Correct Answer pressure

CONCEPT:

  • All measurable quantities are divided into two broad categories:

Scalar quantities

Vector quantities

The physical quantities which have only magnitude and no direction are called scalar quantities or scalars.

The physical quantities which have both magnitude and direction and obey the laws of vector addition are called vector quantities or vectors.

A scalar quantity can be specified by a single number, along with the proper unit.

A vector quantity is specified by a number with a unit and its direction.

Examples: Mass, volume, density, time, temperature, electric current, distance, Energy, speed, etc.

Examples Displacement, velocity, force, weight, torque, momentum, acceleration, velocity, etc

EXPLANATION:

  • From the above table, it is clear that force, velocity, and acceleration are vector quantity because they have both magnitude as well as direction. Therefore option 1, 2, and 3 is incorrect.
  • Pressure is defined as force per unit area. It is a scalar quantity because it has only magnitude and it is independent on the size of the area chosen. Therefore option 4 is correct.

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