Question

How to identify scalar and vector quantities?

Answer 1

vector is a quantity that requires twonumbers to describe it i.e., magnitude and direction,while a scalar is a quantity that requires only one number to describe it.

You’ll have to remember whether base quantities are scalars or vectors.

Remember whether the following are scalars or vectors:

Displacement-VectorTime-ScalarMass-ScalarCurrent-ScalarTemperature-scalar

These are the quantities you’ll use more often.

Now,obviously derivatives of vector quantities are vectors (e.g. d(displacement)/d(time)=velocity-vector) and vectors multiplied by scalars are vectors(Force(=mass*acceleration)-is a vector)

And some quantities are defined to vectors,you’ll have to remember them.

Answer 2

If any object move with any speed and having and magnitude in particular direction than it is said to be vector quantity while if any object move with any speed and having magnitude but no direction than it is said to be scaler quantity......
If body has magnitude and direction than we can identify that it is vector quantity while if a body have only magnitude but no direction then we can come to know that it is scaler quantity.......