Question

on his fishing trip Justin rides in a boat 12 km south. The fish aren't biting so they go 4 km west. They then follow a school of fish 1 km north. What was her displacement.

Answer 1

Distance = 12km + 4km + 1km = 17 km

If the unit vectors along north and east is j and i respectively then
Displacement = (12(-j) + 4(-i) + j) km
= (-4i + 11j) km

Magnitude of displacement = sqrt(4^2 + 11^2) = 11.70 km