1. The problem statement, all variables and given/known data Hey guys! I'm at loss what to do for these 2 problems, have no idea how to start and what equations to use. First Person standing on a bridge overlooking a highway drops an apple over the railing just as the front end of a truck passes directly below the railing. If the vehicle is moving at 55 km/h and is 12 m long, how far above the truck must the railing be if the apple just misses hitting the rear end of the truck? Second. There is a boy and a girl, both have mirrors and a skateboard, the boy does not move while the girl moves with the use of skateboard. Boy observes the girl's time to stop in the limit in which she moves at the speed of light and she also comes to the same conclusion about the boy How does the boy(and the girl) come to that conclusion? 3. The attempt at a solution Obviously we should use the equations for position velocity and acceleration, problem is, how do I apply those?