Motion in One Dimension – Speed

Speed

 Def : It is the rate of change of distance covered with respect to time covered with the particle and it is a scalar quantity

(i)Instantaneous Speed:  

It is the speed of a particle at particular instant. When we say “speed”, it usually means instantaneous speed.

Instantaneous speed  =   =

(ii) Average speed  =

(iii) Uniform speed :

If during the entire motion magnitude of speed of the body remains same, the body is said to have uniform speed.

(iv) Non-uniform speed :

If magnitude of speed changes, the body is said to have non-uniform speed.