Question

Explain me about Acceleration and retardation...................

Answer 1

The acceleration can only be denoted as positive acceleration and negative acceleration. As acceleration is a vector, it has magnitude and direction dependence. When we say deceleration, it means the speed is slowing down. ... The Retardation is used in general context, it also means same as deceleration.

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Answer 2

the negative acceleration is called as retardation