when is the acceleration of a body is positive,negative and zero
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Positive acceleration:
when the velocity of a moving body I'd increasing time by time, then it is said to be in positive acceleration
Zero Acceleration:
when a moving body is moving with a constant velocity for sometime, it is said to be in zero acceleration
Negative Acceleration :
Negative acceleration is also called retardation, when the velocity of a moving body is decreasing time by time, it is said to be in retardation or Negative acceleration
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