Question
When is a body said to have
(i) uniform velocity and
(ii) variable velocity ?
Solution
(i) Uniform velocity:
If a body covers equal distances in equal intervals of time in a given direction, the body is moving with a ‘uniform velocity’. The velocity of the body does not change with time. So in uniform velocity, a body moves with uniform speed in a given direction.
For example, light travels with a uniform velocity of 3×10 m/s through vacuum.
(ii) Variable velocity:
When a body travels unequal distances in equal intervals of time, such that its direction changes, or both change, velocity is said to be ‘variable velocity’.
For example, a bus turning at a junction has variable velocity.
