Ok, so the runner then goes from 20m to 11m. Distance? Displacement?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?

In a good thermo flask the main cause of heat loss is