Question

A boat is going across a river at 15 m/s in an easterly direction. The river currant flows north at 4 m/s. Report the magnitude of the velocity.

Answer 1

Answer on Question 39154, Physics, Mechanics,Kinematics,Dynamics

To find the length of the sum of two vectors (15 and 4 m/s) we will us Pifagor theorem, as they perpendicular each to other. Hence, magnitude of velocity is:

$v=\sqrt{15^{2}+4^{2}}\approx 15.5\,m/s$