Question

Danielle is traveling and Siri tell her to go 35 miles North and make a u-turn. After Danielle makes the u-turn, Siri tells her to travel 17 miles South It took Danielle 1 hour to do this. What is Danielle's displacement (in miles) ?

Answer 1

According to the problem, the first displacement is 35 miles and the second one is 17 miles South. In order to find Danielle's displacement, we just have to subtract the vectors (both are vertical vectors).

`(35j-17j)mi=18j(mi)`

Hence, Danielle's displacement is 18j, that is, 18 miles North.