Patricia roller skates 0.50 kilometers, straight north to the library. then she walks 0.25 kilometers to her friend's house, which is straight north of the library. what is patricia's displacement?
1)0.75 km, north
2)0.25 km, north
3)0 km
4)0.75 km
5)cannot be determined because she roller skated on one section and walked on another
Answers: 2
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Patricia roller skates 0.50 kilometers, straight north to the library. then she walks 0.25 kilometer...
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