Q: When is the acceleration taken as negative?

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Positive acceleration = speeding up. Negative acceleration = 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.

Retardation or deceleration is negative acceleration. It is opposite to the direction of velocity.

Actually, it depends on how you define the coordinate axes, but usually when moving forward, negative acceleration decreasesspeed, positive acceleration increasesit.

Negative acceleration is also called as deceleration.

Related questions

retardation is nothing but the decrease in speed. so if the increase in speed can be taken as positive then for sure decrease in speed can be taken as negative acceleration.

If it is gravitational acceleration then it it is positive in downward and negative in upward direction..if it is not gravitational acceleration then it is depending upon the value of acceleration.

It cannot have negative velocity, it can have negative acceleration.

Yes, acceleration can be positive and negative because acceleration is a vector. It has both direction and magnitude. The direction is what makes it positive or negative. Negative acceleration is usually called deceleration.

Positive acceleration = speeding up. Negative acceleration = slowing down.

Positive acceleration = speeding up. Negative acceleration = slowing down.

A plane landing is a negative acceleration - "negative" meaning it slows down.

false A car can have a negative acceleration and be speeding up. A negative acceleration determines the direction of the acceleration A car with forward acceleration will speed up in the forward direction A car moving forward with a negative acceleration will slow down A car not moving with a negative acceleration will speed up in the backward direction A car moving backward with a negative acceleration will speed up in the backward direction

Positive is speeding up and negative 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.

Retardation or deceleration is negative acceleration. It is opposite to the direction of velocity.

Acceleration is any change in velocity. Negative acceleration is when the change is such that the speed decreases.