Final answer:
To find the average speed of a marble across a smooth surface, divide the distance by the time. Using a given example, a marble traveled 5.2 m in 1.8 s, resulting in an average speed of 2.89 m/s. This does not match the provided options, indicating a need for additional information to answer correctly.
Step-by-step explanation:
To determine what is the average speed of the marble traveling across a smooth surface, we need to consider the formula for average speed, which is the total distance traveled divided by the total time taken. The provided worked example illustrates this well:
Calculating Average Speed
A marble rolls 5.2 m in 1.8 s. What was the marble's average speed?
Using the information from the worked example and applying the average speed formula = (Distance) / (Time), we find that the average speed of the marble is:
Speed = 5.2 m / 1.8 s = 2.89 m/s
This speed does not directly answer one of the multiple-choice options, which indicates that further or different information is required to answer the question accurately or that the question might be hypothetical or context-driven. Without additional specific details or context, an exact answer from the provided options cannot confidently be given.