UNIFORM MOTION question

Question

What is the displacement of the race car drivers in the Indy 500? (A 200 lap race around a track)

The diagram below shows the position of a cross-country skier at various times. At each of the indicated times, the skier turns around and reverses the direction of travel. In other words, the skier moves from A to B to C to D.

Use the diagram to determine the average velocity of the skier during these three minutes. Answer in m/min

Consider a football coach pacing back and forth along the sidelines. The diagram below shows several of coach's positions at various times. At each marked position, the coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D.

What is the coach's average velocity? Answer in yards/min

Answer 1

average velocity = displacement / time

displacement = final position - initial position

So for the skier, the displacement is 140.

Hope you can go from here by yourself.