When is the acceleration $(i)$ positive and $(ii)$ negative?
(N/A) $(i)$ If the velocity of a body is increasing with respect to time,the acceleration is said to be positive.
$(ii)$ If the velocity of a body is decreasing with respect to time,the acceleration is said to be negative.
$(ii)$ If the velocity of a body is decreasing with respect to time,the acceleration is said to be negative.
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