117. Two boats leave a marina at the same time. One travels south and the other travels north. The southbound boat travels 6 mph faster than the northbound boat. After 3 hr, the distance between the boats is 66 mi. Determine the speed of each boat.

23 of 26 Review I Constants A sports car starts from rest at an intersection and accelerates toward the east on a straight road at 9.0 m/s². Just as the sports car starts to move, a bus traveling east at a constant 18 m/s on the same straight road passes the sports car. When the Fore sports car catches up with and passes the bus, how much time has elapsed? Express your answer with the appropriate units. HÀ t = Value Units Submit Previous Answers Request Answer Incorrect: Tru Again: 3 attemnte remainina F9 F10 delete 9. P

4. Consider path B in the figure to the right. What is (a) the distance traveled? (b) the A B C displacement? e D 0 2 4 6 8 10 12 displacement x (m)

7) A cyclist moves at 11.0 m/s for 1.00 min and at 16.0 m/s for 2.00 min. Find the average velocity if the second part of the motion is (a) in the same direction as the first (hint, the answer is not 13.5 m/s), and (b) in the opposite direction.

14) In the following velocity vs. time graph, what is the displacement between 10 and 15 seconds? velocity (m/min) 80 60 40 20 time (min) - 20 40 10 20 40 50 57 N at 30° CCW E = 30

You get in your car and drive north, accelerating up to 60mph. Draw your velocity vector and acceleration vector some time during your acceleration. How would these change if you encountered traffic and started to brake?