How Do You Calculate Net Displacement in Multiple Directions?

[emilyjbee]

A student runs 30m east, 40m north and 50m west. What is the magnitude of the students net displacement? What is the net displacement?

I can't find an equation to solve this problem. Could someone please give me some guildlines to figure out net displacement of multiple directions?

 

[learningphysics]

A student runs 30m east, 40m north and 50m west. What is the magnitude of the students net displacement? What is the net displacement?

I can't find an equation to solve this problem. Could someone please give me some guildlines to figure out net displacement of multiple directions?

Can you simplify the sum of these 3 vectors to a sum of 2... Hint: what is the net displacement of 30m east and 50m west.