Now, consider a boat in a river going from one bank of the river to the other in a
direction perpendicular to the flow of the river Then, it is acted upon by two velocity
vectors–one is the velocity imparted to the boat by its engine and other one is the
velocity of the flow of river water Under the simultaneous influence of these two
velocities, the boat in actual starts travelling with a different velocity To have a precise
idea about the effective speed and direction
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