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CBSE Class 9 Answered

What is retardation?
Asked by Naman | 22 Sep, 2014, 08:36: PM
answered-by-expert Expert Answer
Retardation means negative acceleration. The velocity of a body may increase or decrease .Acceleration takes place when the velocity of a body changes. So when the velocity of a body increase, the acceleration is said to be positive and when the velocity of a body decrease, the acceleration is said to be negative(Retardation).A body is said to be retarded if its velocity is decreasing. 
Eg: a train is said to be retarded when it slows down on reaching a station,i.e. the velocity decreases.Retardation is acceleration with negative sign. Or negative value of acceleration shows that the velocity of a body is decreasing.
Answered by Jyothi Nair | 23 Sep, 2014, 08:34: AM

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