Question

A worker leaves home at 9:00 AM, travels 40 km to the office, and then returns home at 5:00 PM. What is the magnitude of the worker's displacement during this 8-hour span of time? 80 km 0 km 40 km 10 km/h

Answer 1

the answer is 0 km 

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Answer 2

Answer: Hi! The answer to this problem is 0km.

Ok, the definition of displacement is the change in position.

So if in this 8 hours i first travel 40 km in one direction, and the i traveled -40km in the same direction i would be on the same place, so the total displacement would be 0 km.