Definition of Physics CH # 3

Velocity: 

"Rate of displacement of a body is called velocity". 
                                                OR  
"Speed of a body in a particular direction is called velocity"- 

:Velocity is a vector quantity,it's direction is same as the direction of displacement . It's unit in M.K.S system is m/s 

Definition of Physics CH # 3

Uniform velocity :

 "If a body covers equal distances in equal intervals of time in a particular direction then it's velocity is said to be uniform. 
                                                                       OR 
"if speed of a body is constant in a particular direction then it's velocity will be uniform".
 If a body moves with uniform velocity then it's instantaneous and average velocities will be equal . 
v= uniform , when v av = v inst.   

Definition of Physics CH# 3

Average velocity: 

"Total displacement divided by total time taken. is called average velocity". 

Instantaneous velocity: 

"It is the velocity of a body at a particular instant".
 Mathematically the instantaneous velocity of a body is given by : 

Definition of Physics CH # 3

Velocity: 

"Rate of displacement of a body is called velocity".
                                                  OR
"Speed of a body in a particular direction is called velocity"- 

:Velocity is a vector quantity , it's direction is same as the direction of displacement . It's unit in M.K.S system is m/s 

Where Ar is the displacement of the body in time At