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Yes. When the change in velocity (final velocity-initial velocity) is negative, the acceleration will be negative. For example, when a vehicle slows down to a stop, the change in velocity is negative because the final velocity is less than the initial velocity, which makes the change in velocity negative. Therefore the acceleration will be negative. a=(vf-vi)/(t2-t1)

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Q: Can an object acceleration be a negative?

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Positive acceleration results in the object speeding up, such as a car going from 0mph to 30mph. Negative acceleration is the object decelerating, such as using the brake in a car.

Acceleration is a vector. It has both a magnitude and a direction. So you first have to choose which direction is positive. Lets say we choose "left" as negative and "right" as positive. If an object is increasing speed (positive magnitude) while moving Right (positive direction) its acceleration is Positive' If an object is decreasing speed (negative magnitude) while moving Right (positive direction) its acceleration is Negative. If an object is increasing speed (positive) while moving Left (negative direction) its acceleration is Negative. If an object is decreasing speed (negative) while moving Left (negative) its acceleration is Positive. For vertical motion you would probably choose "up" as positive and "down" as negative.

When an object slows down, its acceleration is negative (in a linear sense), or in a direction opposed to its motion (in a vector sense).

A change in speed is a change in velocity - so, a change in speed is an example of acceleration! Acceleration may be positive or negative. Negative acceleration is sometimes called deceleration. When a force acts on an object; it may change the object's acceleration (speed, direction, or both).

This would indicate negative acceleration, which would mean that the object in question is speeding up.

Related questions

Deceleration or negative acceleration is when an object or thing gets slower

Retardation or negative acceleration or deceleration.

I goes the negative direction ;)

Negative

Retardation or negative acceleration or deceleration.

no

Yes, all a negative acceleration means is the object is slowing down.

Acceleration is negative when the object is moving in the opposite direction. on a graph the line would be in the negative quadrant.

Both velocity and acceleration can be negative when an object is slowing down, or when an object accelerates backwards, which is a negative direction, such as a car backing out of a driveway.

yes

Yes. An object slowing down but still moving in a positive direction has a positive velocity but a negative acceleration.

No. A negative acceleration could mean a change in direction

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