It is physically impossible for an object to have a negative acceleration and yet be speeding up.

Question

Quizplus · Accepted Answer

Acceleration is a vector quantity, which means it has both magnitude and direction. If an object is speeding up, it means that its velocity is increasing, which implies that the object has acceleration in the same direction as its velocity vector. If the acceleration is negative, it means that it is acting in the opposite direction to the velocity vector, which cannot cause an increase in speed. Therefore, an object cannot have a negative acceleration and be speeding up at the same time.

It Is Physically Impossible for an Object to Have a Negative