Introduction to mechanics

Mechanics

Introduction to physics

What is known as vectors?

 vectors are quantities which have a magnitude and a direction.                                                                        eg:-  velocity

                  Force

                  Momentum                      

                  Displacement

                  Acceleration

what is known as scalers

scalers are quantities which only have a magnitude.
         eg:-  power 
                 distance
                 speed
                 pressure

properties of vectors

   A vector can be multiplied by a scaler(img:1). If the scaler is positive it wan't change the direction of the vector. But if the scaler is negative then it will change the direction as well(img:2). But in both cases it will change the magnitude of the vector.

img:1

img:2

A vector can be represented by two ways.

              1. we can use a letter and underline then it represents a whole vector(img:3).

img:3

             2. we can use capital letters for the ends of vectors and draw an arrow necessarily to indicate the direction head(img:4).

img:4

Negative vectors 

         Negative vectors are vectors which have the opposite direction of the current vector.(img:5) (img:6)

img:5

img:6