Question

What is the difference between scalar and vector quantity?

Answer 1

Scalar quantities have only magnitude where as in vector quantities, there is magnitude as well as direction.
For example, if we say volume is 100 m³, that means it has only magnitude but we have to say that velocity of the car is 100 km/h towards north direction.
Scalar quantities - speed, volume, distance, density, etc
vector- velocity, displacement, etc

Answer 2

Answer:

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✦A scalar or scalar quantity in physics is one that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. A scalar is usually said to be a physical quantity that only has magnitude, possibly a sign, and no other characteristics.

✦Vector, in physics is a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude.