Question

define uniform velocity and uniform acceleration write their units

Answer 1

A body is said to be in uniform motion if it covers equal distance in equal intervals of time in a particular direction. 
Uniform Acceleration is the acceleration in which the object changes its velocity with equal intervals of time .

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Answer 2

Hi frndd,
Here's us answer:
•The rate of change of displacement with equal distance in equal interval of time is called uniform velocity.
•the rate of Change & velocity in equal distance with equal intervals of time is called uniform acceleration.
S.i unit of acceleration is m/s²
S.i unit of velocity is m/sec

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Hope this maybe helpful to u..frndd