A ferry boat is sailing at 12 km/h 30° W of N with respect to a river that is flowing at 6.0 km/h E.As observed from the shore, the ferry boat is sailing:
A)30°E of N
B)due N
C)30°W of N
D)45° E of N
E)none of these

Question

Quizplus · Accepted Answer

The ferry's velocity relative to the shore is the vector sum of its velocity relative to the river and the river's velocity. The eastward river flow cancels out the westward component of the ferry's velocity, resulting in a net northward movement.

A Ferry Boat Is Sailing at 12 Km/h 30° W