Physics · Forces and Motion
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A person travels 4 km east, then 4 km south and finally travels in such a way that his journey terminates 4 km directly west of the starting point. What is the magnitude of the displacement during the third leg of the journey?
- A
4√5 km
- B
40 km
- C
80 km
- D
4√2 km
The correct answer is 4√5 km. By breaking down the components of the journey and applying Pythagoras' theorem, the displacement for the third leg can be calculated as 4√5 km. This represents the shortest distance between the starting and ending points of the third leg. The other options provided do not accurately reflect the magnitude of the displacement for the third leg of the journey.
Correct! By applying Pythagoras’ theorem, the displacement for the third leg is calculated as 4√5 km.
This option is incorrect as it does not accurately represent the magnitude of the displacement for the third leg.
This option is incorrect as it does not accurately represent the magnitude of the displacement for the third leg.
This option is incorrect as it does not accurately represent the magnitude of the displacement for the third leg.
Tagged under Physics · Forces and Motion · 2017