Question

Define accelation when is the acceleration of a body positive and negative ​

Answer 1

According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. In Example D, the object is moving in the negative direction (i.e., has a negative velocity) and is speeding up.

Answer 2

Answer:

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Explanation:

 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.

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