Kinematics-Defining Motion Base your answers to questions 18 through 20 on the in- | 23. The diagram below shows a resultant vector, R. formation and vector diagram below. A dog walks 8 meters due north and then 6 meters due east. Which diagram below best represents a pair of com- 6.0 m ponent vectors, A and B, that would combine to form we fre resultant vector R? 8.0 m B B (1) (3) 18. Using a metric ruler and the vector diagram, deter- A B mine the scale used in the diagram. (2) (4) 1 cm = Base your answers to questions 24 and 25 on the Infor- 19. On the diagram above, construct the re- mation below. sultant vector that represents the dog's total displacement. A stream is 30 meters wide and its current flows south- ward at 1.5 meters per second. A toy boat is launched 20. Determine the magnitude of the dog's with a velocity of 2.0 meters per second eastward from total displacement. the west bank of the stream. 24. What is the magnitude of the boat's resultant veloc- ity as it crosses the stream? 1. 0.5 m/s 2. 2.5 m/s 3. 3.0 m/s 4. 3.5 m/s 21. On a highway, a car is driven 80 kilometers during the first hour of travel, 50 kilometers during the next 0.50 25. How much time is required for the boat to reach the hour, and 40 kilometers in the final 0.50 hour. What opposite bank of the stream? 1. 8.6 5 is the car's average speed for the entire trip? 2. 12 s 1. 45 km/h 3. 15 s 2. 60 km/h 4. 60 s 3. 85 km/h 4. 170 km/h 26. A person walks 150 meters due east and then walks 22. Explain the difference between a scalar and a vector 30 meters due west. The entire trip takes the person 10 minutes. Determine the magnitude and direction quantity. of the person's total displacement. Page 8 VEL.A1, ACC.A1 APlusPhysics: Kinematics-Defining MotionKinematics-Defining Motion 27. A high-speed train in Japan travels a distance of 300 | Base your answers to questions 32 and 33 on the follow- kilometers in 3.60 x 103 seconds. What is the average ing information. speed of this train? 1. 1.20 * 10 m/s A hiker walks 5 kilometers due north and then 7 kilome- 2. 8.33 x 103 m/s ters due east. 3. 12.0 m/'s 4. 83.3 m/s 32. What is the magnitude of her resultant displacement? 28. A child walks 5 meters north, then 4 meters east, and finally 2 meters south. What is the magnitude of the resultant displacement of the child after the entire walk? 1. 1.0 m 33. What total distance has she traveled? 2. 5.0 m 3. 3.0 m 4. 11.0 m 29. Scalar is to vector as 1. speed is to velocity Base your answers to questions 34 and 35 on the infor- 2. ' displacement is to distance mation below. 3. displacement is to velocity 4. speed is to distance In a drill during basketball practice, a player runs the length of the 30-meter court and back. The player does 30. A car travels 90 meters due north in 15 seconds. Then this three times in 60 seconds. the car turns around and travels 40 meters due south in 5 seconds. What is the magnitude of the average velocity of the car during this 20-second interval? 1. 2.5 m/s 2. 5.0 m/'s 30. m 3. 6.5 m/s 4. 7.0 m/s (Not drawn to scale) 31. Velocity is to speed as displacement is to 34. The magnitude of the player's total displacement 1. acceleration after running the drill is 2. time 1. 0.0 m 3. momentum 2. 30 m 4. distance 60 m , 180 m 35. The average speed of the player during the drill is 1. 0.0 m/s 2. 0.50 m/s 3. 3.0 m/s 4. 30 m/'s APlusPhysics: Kinematics-Defining Motion VEL A1, ACC.Al Page 9