Final answer:
The average acceleration can be calculated by dividing the change in velocity by the time, resulting in an acceleration of 2.0 m/s². Therefore, the correct option is D).
Step-by-step explanation:
The student seems to be referencing a physics problem involving an object sliding down a ramp. The problem requires calculating the acceleration of the sliding box. However, the question as presented appears incomplete because it doesn't provide enough information or context to solve for acceleration. In other cases, such as those listed in the reference information, the acceleration is calculated using the mass of the system and the net force acting on it, applying Newton's second law of motion.
For example, for a system of mass 19.0 kg where the acceleration is 1.5 m/s², the total force can be determined using the equation F = ma, where F is the force, m is the mass, and a is the acceleration. Assuming no other forces like friction, the net force would be 19 kg × 1.5 m/s², equating to 28.5 newtons of force for that particular system.
Looking at a different example provided, if a velocity increases from 0 to 20 m/s in 10 s, the average acceleration can be calculated by dividing the change in velocity by the time, resulting in an acceleration of 2.0 m/s².
Therefore, the correct option is D).