# 2D Kinematics

These two problems are giving me some guff. Any ideas on how to solve?

Two cars approach an intersection of perpendicular streets. Car A is moving north at 10.5 meters per second, and Car B is moving west at 17.1 meters per second. What is the velocity of Car B relative to Car A? (In other words, what is the velocity of Car B in the reference frame of Car A?)
Answer 1 -m/s
Answer 2 -° (referenced to east being 0°, all angles between 0° and 360°)

Two cars approach an intersection of perpendicular streets. Car A is moving north at 10.5 meters per second, and Car B is moving west at 17.1 meters per second. What is the velocity of Car B relative to Car A? (In other words, what is the velocity of Car B in the reference frame of Car A?)
Answer 1 m/s
Answer 2 ° (referenced to east being 0°, all angles between 0° and 360°)

## Answers and Replies

first, if you where in car A, how would car B appear to you in frame of reference?

so think of it this way. the cars are moving as discribed; however, there is no road. instead, they are in space with nothing else around.