Question

which statement correctly describes the differences between positive and negative acceleration?

• positive acceleration describes a change in speed; negative acceleration describes no change in speed.
• positive acceleration describes no change in speed; negative acceleration describes a change in speed.
• positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed
• positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed

Explanation:

Acceleration is the rate of change of velocity. Positive acceleration occurs when velocity increases (speed increases if direction is constant), and negative acceleration (deceleration) occurs when velocity decreases (speed decreases if direction is constant). The correct statement matches this definition.

Answer:

Positive acceleration describes an increase in speed, negative acceleration describes a decrease in speed