It is the distance covered by the particle in one second.
(i) It is a scalar quantity
(ii) Unit : In m.k.s. Meter/Second or km/sec.
In C.G.S. cm/sec
(iii) Dimension : [M⁰L¹T^–1]
Types of speed :
(a) Instantaneous speed
(b) Average speed
(c) Uniform speed
(d) Non-uniform speed
(a) Instantaneous Speed :
It is the speed of a particle at particular instant. Instantaneous speed =
(b) Average speed =
(c) Uniform speed : If during the entire motion speed of the body remains same, the body is said to have uniform speed.
(d) Non-uniform speed : If speed changes, the body is said to have non-uniform speed.