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Can an object have a negative acceleration?

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When you work in two dimensions you can have situations where it has a positive x acceleration and negative y acceleration. Or any other combination of plus minus x, y, position, velocity, acceleration. The math gets a bit messier. If you are consistent they all describe the same outcome. read more

At a point, the object will have its velocity so decreased by negative acceleration that the object will have reached its highest point. At that point, the velocity of the object is zero. However, it never is free of the negative acceleration of gravity. read more

Speeding up means that the magnitude (the value) of the velocity is increasing. For instance, an object with a velocity changing from +3 m/s to + 9 m/s is speeding up. read more

Yes. Acceleration is a vector quantity -- it has magnitude and direction. The choice of coordinate systems is arbitrary. Example: Let's call 'up' the positive direction. read more

No. Negative acceleration means that you are decreasing in acceleration, like braking a car. Therefore, you can't be speeding up because speed and. read more

Yes, an object can have both a negative acceleration and a negative velocity. A velocity is a speed in one direction, as oppossed to a speed which is just a speed in any direction, and which can change direction at will. read more

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