Answer to Question #255468 in Mechanics | Relativity for Guess Who

Question

A boat moves 2.5 m/s north across a river flowing 1.2 m/s east. What is the speed of the boat relative to the shore?

Answer 1

The two velocities are at right angles to each other.

Therefore, the speed of the boat relative to the shore $=\sqrt{2.5^2+1.2^2}=2.8m/s$