Q. A boat moves through the water of a river at 14 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.5 m/s, how long does it take the boat to make a round trip consisting of a 315 m displacement downstream followed by a 315 m displacement upstream?
Q. A small steel ball bearing with a mass of 23.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.43 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 32.0 deg from the horizontal.