A boat moves with a velocity of 15m/s north in a river, which flows with a velocity of 8m/ s west. Calculate the boat resistant velocity with respect due to North.

Answer 1

resultant, not resistant.

It will be θ west of north, with tanθ = 8/15
and of course, you recognize an 8-15-17 triangle, right?

Answer 2

A boat moves with a velocity of 15m/s north in a river, which flows with a velocity of 8m/ s west. Calculate the boat resistant velocity with respect due to North.

Answer 3

7m/s