Question

A man runs 300 m west in 60 seconds. He then runs 100m north-west in 20 seconds. What is his average velocity in meter per second?

Answer 1

See below

Step-by-step explanation:

Total distance = 300 + 100 = 400 meters in 60 + 20 = 80 seconds

400 m / 80 s = 5 m/s

If you are using DISPLACEMENT:
displacement = sqrt ( ( 300 + 100 cos 45)^2 + (100sin 45)^2 ) = 377.4 m

in 80 seconds 377.4 / 80 = 4.7 m/s