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What is the difference between a vector and scalar quantity?
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Scalar quantity refers to the quantity, which has only magnitude.

vector  is the physical quantity which has both magnitude and direction.

by Wooden (361 points)
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1. The scalar quantity is defined as the quantity that has only got magnitude, but not directions whereas, vector quantity comprises of both magnitude and directions.
2. The scalar quantity is only one dimensional and vector quantity is multi-dimensional.
3. Scalar quantity changes if its magnitude changes, but vector quantity changes when magnitude or direction or both changes.
4. There are normal algebra rules for the scalar quantity and also for vector quantity there is separate vector algebra.
5. The scalar quantity can divide another scalar quantity, but in case of the vector quantity, two vectors cannot be divided.

Some of the examples of scalar quantities are mass, volume, charge, speed, time and electric potential. The distance between the two points in the space is the scalar quantity, but not its direction. Also, velocity is a vector quantity, because it is the measure of the rate of an object changing its position.

by Wooden (698 points)
edited

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