Explanation:
Given that,
A student travels 11 m north and then turns around to travel 25 m south.
Total time, t = 12 s
The total distance or the total path covered by the student is equal to 11 m + 25 m = 36 m
Displacement of the student or the shortest path covered is d = 25-11 = 14 m
(a) The student's average speed = total distance/total time
[tex]s=\dfrac{36\ m}{12\ s}\\\\s=3\ m/s[/tex]
(b) The student's average velocity = total displacement/total time
[tex]v=\dfrac{14\ m}{12\ s}\\\\v=1.17\ m/s[/tex]
