Acceleration is the rate of change of velocity
The statements that correctly describe acceleration are;
- Negative acceleration occurs when an object slows down in the positive direction
- Positive acceleration occurs when an object speeds up in the positive direction
The reason the above selected options are correct are as follows:
Acceleration is the rate at which the velocity of an object changes with time
Positive acceleration is said to be taking place when the speed of an object continuously increases with time. For example, the speed of a falling object increases as the time of fall increases
Negative acceleration occurs when the speed of an object decreases with time. An example of negative acceleration can be seen when an object is thrown vertically upwards at a speed. The speed of the object continuously reduces with time until it eventually stops going upwards and starts to come downwards
Therefore, taking the positive direction as the intended direction of the object in the examples above, the correct statements are;
Negative acceleration occurs when an object slows down in the positive direction
Positive acceleration occurs when an object speeds up in the positive direction
Learn more about acceleration here:
https://brainly.com/question/14613567
