Question

A physics student walks 100 meters in 80 seconds. The student stops for 30 seconds, and then walks 200 meters

farther in 90 seconds. What is the average speed of the entire walk?
A. 0.67m/s
B. 1.5m/s
C. 1.8m/s
D. 3.5m/s

Answer 1

The average speed of the student's entire walk is calculated by dividing the total distance walked (300 meters) by the total time taken (200 seconds), resulting in 1.5 m/s.

Step-by-step explanation:

To calculate the average speed of the entire walk, we need to consider the total distance walked and the total time taken, including any stops. The student walks a total distance of 100 meters + 200 meters = 300 meters. The total time taken is 80 seconds + 30 seconds (stop) + 90 seconds = 200 seconds.

The average speed can then be calculated by dividing the total distance by the total time. So, the average speed = 300 meters / 200 seconds = 1.5 meters per second (m/s).

Therefore, the average speed of the student's entire walk is 1.5 m/s.