Question

A boy is running on a straight road. He runs 500 towards north in 10 minutes and then turns back and runs 200 meters in 1 minute. Calculate his average speed and average velocity during the whole journey.

Answer 1

distance = 500 m

time = 10 mins = 600 s

speed = 500/600 = 0.83333...m/s

displacement = 500 m - 200 m

displacement = 300 m

time = 1 min  = 60 s

velocity = 300/60 = 5 m/s