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 AP Physics Chapter 2 Study Guide Relative Motion   Relative velocity of a passenger on a train with respect to a person on the ground.   Sample Problem   Suppose the passenger on the train is climbing a vertical ladder with a speed of and the train is slowly coasting forward at . Find the speed and direction of the passenger relative to the ground.     Boat Problem Java   Sample Problem You are riding in a boat going at an angle of 25¾ upstream on a river flowing at . What is your velocity relative to the ground?       Sample Problem: In the figure a bat detects an insect (lunch) while the two are flying. The bat has velocity relative to the ground, and the insect has velocity relative to the ground. What is the velocity of the insect relative to the bat, in unit-vector notation and as a magnitude and an angle?