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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.
The velocity has to increase in a positive direction. The increase in velocity in a positive direction is a positive acceleration.
Positive acceleration = speeding up. Negative acceleration = slowing down.
No. "Positive acceleration" means increasing speed. The acceleration is usually constantin typical Physics examples and applications.
Positive is speeding up and negative is slowing down
Positive acceleration could be called "speeding up" if you felt like it.
Actually, it depends on how you define the coordinate axes, but usually when moving forward, negative acceleration decreasesspeed, positive acceleration increasesit.
Acceleration doesn't mean "speeding up". It only means that the speed or direction of motion, or both, are changing. Speeding up is positive acceleration in the direction you're moving. Slowing down is negative acceleration in the direction you're moving, or positive acceleration in the opposite direction.
Positive acceleration is an increase in velocity in the direction in which motion is being measured.
The acceleration is positive.
Positive acceleration = speeding up. Negative acceleration = slowing down.