Answer:
His velocity is 38.46 m/s south
Explanation:
Velocity is a vector quantity that measures displacement over time
George walks 750 meters north
Then he turns around and walks 250 meters south
The entire walk takes him 13 seconds
His speed is 76.92 meters per second
We need to find his velocity
He walks north for 750 meters and then walks to south 250 meters, so
his displacement is the difference between the final position and
the initial position
His displacement = 250 - 750 = -500
The negative sign means he moves in opposite direction
The displacement is 500 to south
The time of his trip = 13 seconds
Velocity = displacement ÷ time
→ Velocity = -500 ÷ 13 = -38.46 m/s
His velocity is 38.46 m/s south
