State, for each of the following physical quantities, if it is a scalar or a vector:
Volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Question

Two vectors are given by $\vec{A} = \hat{i} - 2\hat{j} + 3\hat{k}$ and $\vec{B} = 2\hat{i} - 4\hat{j} + 3\hat{k}$. The unit vector along $\vec{A} + \vec{B}$ is

Answer 1

Physical Quantity	Type
Volume	Scalar
Mass	Scalar
Speed	Scalar
Acceleration	Vector
Density	Scalar
Number of moles	Scalar
Velocity	Vector
Angular frequency	Scalar
Displacement	Vector
Angular velocity	Vector

Key idea

Scalars have only magnitude (no direction): volume, mass, speed, density, number of moles, angular frequency.
Vectors have both magnitude and direction: acceleration, velocity, displacement, angular velocity.

State, for each of the following physical quantities, if it is a scalar or a vector:
Volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Solution and Explanation

Key idea

Top Questions on Motion in a plane

Questions Asked in CBSE Class XI exam

State, for each of the following physical quantities, if it is a scalar or a vector: Volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Solution and Explanation

Key idea

Top Questions on Motion in a plane

Questions Asked in CBSE Class XI exam

State, for each of the following physical quantities, if it is a scalar or a vector:
Volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.