Answer :
A scalar quantity is a magnitude without direction. So time is the scalar quantity as time only contains a magnitude and not a direction.
Option (d) is correct. Time is considered as a scalar quantity.
Explanation:
The physical quantities are expressed in two broad categories.
- Scalar Quantities
- Vector Quantities
The Scalar Quantities are the quantities that require only the magnitude for the representation of the physical quantity. The quantity that include only the magnitude in their representation are the distance, speed etc.
The Vector Quantities are the quantities that require the magnitude as well as the direction for the representation of the quantity. The unit such as the displacement, velocity, force etc of a body are the vector quantities.
The displacement of a body is defined as the distance between the initial and final point of the body in a particular direction. The velocity of a body is defined as the change of change of displacement of the body in a particular direction. Since both displacement and velocity involve the direction, they are not scalar quantity.
The momentum of a body is defined as the product of the velocity and mass of the body. Therefore, momentum is also a vector quantity.
The time does not require any direction for its representation. So, it is considered as a scalar quantity.
Thus, Option (d) is correct. Time is considered as a scalar quantity.
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Answer Details:
Grade: High School
Subject: Physics
Chapter: Scalar and Vector
Keywords:
scalar, quantity, vector, momentum, time, speed, velocity, physical, magnitude, direction, representation, displacement.
