Scalar and vector quantities

Vector quantities change....

When their magnitude changes, direction changes, magnitude and direction both change.

Scalar quantities change....

When their magnitude changes.

What is vector quantity?

A quantity that has magnitude and acts in a particular direction is described as vector.

What is scalar quantity?

A quantity that has magnitude but no particular direction is described as scalar.

Vector qualities include:

Displacement Velocity Acceleration Force Weight Momentum

Scalar quantities include:

Distance Speed Time Power Energy

Why is speed a scalar quantity?

It is the rate of change in the distance travelled by an object, while velocity is a vector quantity - it is the speed of an object in a particular direction.

What quantity is speed?

Scalar

The difference in two vectors quantities is

final vector - initial vector

The difference in two scalar quantities is

large value - small value