Question

define retardation or deccelaration​

Answer 1

Answer:

Negative acceleration is called retardation. If the velocity of a body is decreasing with respect to time, the acceleration is said to be negative. Retardation is the rate of decrease in velocity.

Answer 2

Retardation is the act or result of delaying; the extent to which anything is retarded or delayed; that which retards or delays.