Relative velocity

1. May 17, 2010

thereddevils

1. The problem statement, all variables and given/known data

A wind is blowing at 25 km/h from the direction of 270 degrees . Find the magnitude and direction of the velocity of the wind relative to a cyclist travelling at 20 km/h in the direction of 120 degrees .

2. Relevant equations

3. The attempt at a solution

Using the cosine rule , i found the relative velocity to be 12.6 km/h . And the direction is N 37.47 degree .

Am i correct ?

2. May 17, 2010

tiny-tim

Hi thereddevils!

(it would help if you showed your full calculations)
Yes.