\fIwmarble rolls with a velocity of 1 0 mm/s [E] on a game board that is being pulled [60.00 N of E] i : 40.0 mmls. What is the velocity of the marble relative to the oor? ' l . . . Be careful is this vector addition or subtraction? ; ' i :5 \"v ' lane ies with a velocity of 55.0 We [350 N of W] with respect to the air (this is known as 1 V). If the velocity of the airplane according to an observer on the ground is 40.0 m/s i. What was the wind velocity? to cross a river with the shortest possible time, would you aim your rectiy'acmss the river, or slightly downstream? Explain