Question

under what conditions can an acceleration be zero and negative​

Answer 1

Answer:

In vector form , if angle between velocity vector and acceleration vector is less than 90° and greater than 0° then it is positive acceleration and if it is less than 180° and greater than 90° then it is negative acceleration. If there is no acceleration vector then it is called zero acceleration. 】

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Answer 2

Answer:

if the velocity of a body is constant it's acceleration is 0

and if the velocity of a body is decreasing its acceleration is negative

Explanation:

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