A skier descending from a mountain goes 50 meters in 5 seconds, after descending from a mountain

A skier descending from a mountain goes 50 meters in 5 seconds, after descending from a mountain and continuing to move until a complete stop, he goes another 30 meters in 15 seconds. Find the average speed of the skier for the entire movement.

To find the average speed of a skier, you need to divide the entire path he has traveled by the time to travel the entire path.

All path S:
S = 50 m + 30 m = 80 m.

Travel time for all sections of the track t:
t = 5 s + 15 s = 20 s.

Average speed Vav:
Vav = S / t = 80 m / 20 s = 4 m / s.

Answer: 4 m / s.