One event in a high school track meet is the 400 meter run. if the runners of the 400 meter event start and end at the same location, what is their displacement?
a) 0 meters
b) 200 meters
c) 400 meters
d) 800 meters

 Displacement is a vector quantity( quantity which depends on both direction as well magnitude). Whenever a vector quantity is added in closed loop,its resultant is zero which is same as in this case. Here runners start from some point and return to the same point hencetheir displacement is 0. Hope it helps

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