Considering Conservation of Momentum, the momentum 
before and after must remain the same:
so:
before:
so:
before:
How far will a bus travel if it averages a speed of 65 km/h for 7 hours?
2 answers:
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Answer:
d = 13 miles
Explanation:
Lets say the position of court house is origin in this case
her office is located at 4 miles west and 4 miles south of court house
so here we have coordinate of the office with respect to court house is given as
now the position of her home is located at 1 miles east and 8 miles north of the court house
so the coordinates of her home is given as
now the change in the position is given as the distance between office and home