Question

George walks 90 m north for 30 seconds, then he turns around and walks 120 m south in 40 seconds. What is his average speed during the entire trip?

A) 3.0 m/s
B) 3.75 m/s
C) 4.0 m/s
D) 4.25 m/s

Answer 1

To find George's average speed for the entire trip, add the total distance traveled and divide by the total time. George traveled 210 meters in 70 seconds, giving an average speed of 3 m/s, which is option A).

Step-by-step explanation:

The student's question involves calculating average speed which is a physics concept related to motion. To find the average speed during George's entire trip, we need to use the formula:

Average Speed = Total Distance / Total Time

George walks 90 m north and then 120 m south, for a total distance of 90 m + 120 m = 210 m. The total time taken is 30 seconds north + 40 seconds south = 70 seconds. Using the formula:

Average Speed = 210 m / 70 s = 3 m/s

So the average speed during George's entire trip is 3 m/s, which corresponds to option A).