12. Below is the velocity-time graph for an object moving east. 4. Two cyclists are travelling toward each other at the same speeds. If the velocity of the first cyclist is v, then the velocity of the second cyclist is Velocity-Time Graph Velocity (m/s[E]) O-T 10 O-27 DD 10 20 3.0 4.0 5.0 60 70 8.0 9.0 100 8. For a position-time graph, which of the following statements are true? Time (s) 1. A position-time graph cannot represent accelerated motion. II. The slope of a position-time graph represents acceleration. The acceleration of the object moving east is Ill. A straight line indicates constant velocity. IV. A straight horizontal line represents objects at rest. O 1.8 x 102 m/s2 [east] Ol and II O 5.0 m/s2 [east] Oil and III O 6.0 m/s2 [east] O Ill and IV 30 m/s2 [east] I and IV 18. A soccer player jogs 20 m [E], then sprints 30 m [30 N of E], using the navigator method of describing direction. Use the following information to answer the next question Swimming in a River Components of Vectors Ariver flows at avelacky, "" ". of80 ms [W). A primmer. who can swim at a speed of 20 m's, in will water, is at polat x component y component "X" in the river. Ad II. Ad III. IV. La ! ack represent 20 m/'s 20 m, 0 m, -26 m, and 15 m 19. Refer to the information in Swimming in a River to answer this question. The magnitude of the resultant velocity, ER . of the swimmer relative to the shore is 3.2 m/s O 20 m, 0 m, 26 m, and 15 m 10 m/s O-20 m, 0 m, 26 m, and -15 m 8.2 m/s 6.0 m/s Oom, -20 m, 26 m, and 15 m