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Motion Review Number: ______ Name: ________________KEY____ Date: _________________________ Period: ________________________ 1. What is motion? Motion is the change in position over time 2. The study of motion is known as ______Kinematics__. 3. What is the difference between distance and displacement? Distance is how far you have traveled. Displacement is where you are in relation to your starting point. 4. Speed = ______distance__________ divided by __________time_______ 5. Draw the speed triangle. 6. If a car travels 400m in 20 seconds how fast is it going? S = d/t 7. s = 400m/ 20 sec = 20m/s If you move 50 meters in 10 seconds, what is your speed? S = d/t s =50m/10s = 5m/s 8. travel? You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you S = d/t s = 90m/45s = 2m/s 9. A plane travels 395,000 meters in 9000 seconds. What was its speed? S = d/t s = 395,000m/9,000s = 43.89m/s 10. It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school? S = d/t s = 16km/0.25h = 64km/h 11. How much time will it take for a bug to travel 5 meters across the floor if it is traveling at 1 m/s? 5m/1m/s = 5s 11. You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you’ll be caught for running). How much time will it take to get to your class? T = d/s 200m/1.50m/s = 133.33s 13. In a competition, an athlete threw a flying disk 139 meters through the air. While in flight, the disk traveled at an average speed of 13.0 m/s. How long did the disk remain in the air? T = d/s 139m / 13.0m/s = 10.69s 14. How far can you get away from your little brother with the squirt gun filled with paint if you can travel at 3 m/s and you have 15s before he sees you? D= s * t d = 3m/s * 15s = 45m 15. How far can your little brother get if he can travel at 2.5 m/s and in 5 seconds you will discover that his squirt gun has run out of paint? D = s*t d = 2.5m/s * 5 = 12.5m 16. If you shout into the Grand Canyon, your voice travels at the speed of sound (340 m/s) to the bottom of the canyon and back, and you hear an echo. How deep is the Grand Canyon at a spot where you can hear your echo 5.2 seconds after you shout? D = s*t d = 340m/s * 5.2s = 1,768m 17. The world speed record on water was set on October 8, 1978 by Ken Warby of Blowering Dam, Australia. If Ken drove his motorboat a distance of 1000.0 m in 7.045 s, how fast was his boat moving? S = d/t s = 1000.0m/7.045s = 141.94m/s 18. According to the World Flying Disk Federation, on April 8, 2000, Jennifer Griffin of Fredericksburg, Virginia threw a Frisbee for a distance of 138.56 m to capture the women’s record. If the Frisbee was thrown horizontally with a speed of 13.0 m/s, how long did the Frisbee remain in the air? T = d/s t = 138.56m/13.0m/s = 10.66s 19. A swimmer swam the entire length of a 50 meter pool AND swam back. What is the swimmer’s distance and displacement? Distance = 100m Displacement = 0m 20. A sprinter was running in a race but fell 45 meters into the race. What was the sprinter’s speed and displacement? Distance = 45m Displacement = 45m