Distinguish between Vector quantity and a Scalar quantity.
Vector quantities | scalar quantities |
$(1)$ The physical quantities which require direction over and above their magnitude for their specification are called vector quantities. | $(1)$ The physical quantities which can be described bytheir magnitude only are called scalar quantities. |
$(2)$ For Example : velocity, acceleration, force, weight, Displacement, momentum etc. | $(2)$ For Example : speed, mass, volume, size, temperature, amount of substance, power, work done, pressure, time etc. |
$(3)$ While representing these quantities both magnitude and direction are to be stated. | $(3)$ While representing these quantities only its magnitude is required i.e., correct value with units. |
$(4)$ These quantities can not be added algebraically. | $(4)$ These quantities are added or substracted algebraically. |
Let $\theta$ be the angle between vectors $\vec{A}$ and $\vec{B}$. Which of the following figures correctly represents the angle $\theta$ ?
How can we represent vector quantity ?
The expression $\left( {\frac{1}{{\sqrt 2 }}\hat i + \frac{1}{{\sqrt 2 }}\hat j} \right)$ is a
Explain position and displacement vectors. How the magnitude of vector quantity is represented ?
The unit vector along $\hat i + \hat j$ is