1. The problem statement, all variables and given/known data Find and compare the transformations of the angle of the velocity vector of a particle and the angle of an inclined stick. The relationship between the two frames is as usual. In frame S' a stick makes an angle of θ' with the x' axis. What is the angle θ measured in the S frame? What is the length in the S frame? 2. Relevant equations x' = xcosθ + ysinθ y' = -xsinθ + ycosθ ? 3. The attempt at a solution I really have no idea what the question is really asking. Thanks.