Question

You are riding in the back of an open pick-up truck in the snow as you pass your friend's house. Despite the fact that it is snowing you know that he has a habit of being in his bedroom with the light on and his bedroom window open. Being as you are riding in an open truck in the snow, and being the kind of friend you are, you decide to surprise him with a snowball. Naturally, you want this snowball to enter his room and fly straight across to the other side. You know that to do this you must release the snowball just as you pass his window. (You do have some smarts.) You also know that, to avoid drawing attention from the police since you are violating the law by riding in the back of an open truck the pickup is travelling at the legal limit of 40.0 Km/hr. You also have just come from a sports complex where you have tested your throwing ability to be 66.0 Km/hr. What is the direction in which you must throw the ball in order to accomplish your purpose? Express your answer in degrees. Take zero degrees to be straight towards the window, (i.e. perpendicular to the truck movement) with positive angles being toward the direction of the truck movement and negative angles away from the truck movement.