question_answer

The velocity of a body is\[\text{1}00\text{ km}{{\text{h}}^{-\text{1}}}\], \[\text{3}0{}^\circ \] west of south. Find the north and east components of the vector.

Answer:

                Wherever possible, we express, the laws of physics in vector from, due to the following reasons. (a) Many laws of physics can be expressed in compact from by the use of vectors. (b) The derivations involving many laws of physics can be greatly simplified by the use of vectors. (c) The laws of physics when expressed in vector form remain invariant for translation and rotation of the coordinate system.