Question

What is the difference between scalar and vector quantities?

Answer 1

The main difference between scalar and vector quantity is the scalar quatity have only magnitude but no direction where as vector quantity have both magnitude and direction.
Definition of both are =
Scalar quantities : The physical quantities which require only magnitude to describe them are called scalar quantities or simple scalars .
Ex : length , time , mass etc .
Vector quantities : The physical quantities which require both magnitude and direction to describe them and which obey the laws of vector addition are called vector quantities (or) simple vectors .
Ex : displacement , velocity , acceleration etc .
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Answer 2

scalar quantities need only magnitude to describe them but vector quantities need both direction and magnitude to describe them