Question

when acceleration is positive and negative​

Answer 1

Answer:

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

Explanation:

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Answer 2

Answer:

acceleration is negative when it's come down

and acceleration is positive when is go up