Question

what is between acceleration and retordation

Answer 1

Acceleration is the rate of change of velocity with time. ... Any change in the velocity of an object results in an acceleration: increasing speed (what people usually mean when they say acceleration), decreasing speed (also calleddeceleration or retardation), or changing direction (called centripetalacceleration).

Answer 2

change in velocity wd tym is called acceleration or rate if change velocity wd tym
negative acceleration is retardation