Name: KEY IP 644 lock: Date: / / Review Packet: Position, Distance, Displacement, Motion, Speed and Velocity Multiple Choice C 1. When a driver checks her speedometer, she is checking a. acceleration. b. average speed. c. instantaneous speed. d. final speed C 2. The average speed of a car that travels 500 km in 5 hours is a. 10 km/h. b. 0.100 km/h. c. 100 km/h. d. 1,000 km/h NA 3. Change in position is called a. speed. b. motion. c. velocity. d. average speed A D C D 4. The starting speed of a truck is called a. initial speed. b. final speed. c. acceleration. d. velocity 5. Velocity includes a. speed. b. average speed. c. direction. d. speed and direction 6. Which one of the following is an example of a vector? a. speed b. distance c. displacement d. time 7. A quantity that does not require a direction is called a: a. vector b. scalar c. unit d. variable 8. A sailboat travels 35 km in 5 hr. Which of the following describes the motion of the sailboat? a. Its momentum is 7 km/hr. b. Its acceleration is 7 km/hr. c. Its displacement is 7 km/hr. d. Its average speed is 7 km/hr. 9. Which of the following must be included with magnitude to represent a vector? a. Mass b. Direction c. Acceleration d. volume
10. The diagram below shows the path of a jet from Washington, D.C. to Dallas, TX. The trip takes approximately 2 hours and covers approximately 1900 km. Which of the following best describes the speed and direction of the jet s flight? a. 475 km/h southwest b. 950 km/h southwest c. 1900 km/h southwest d. 3800 km/h southwest 11. An airplane takes off from oston for the 980 km trip to Detroit. The plane lands two hours later. Which of the following best describes the average speed and direction of the airplane s flight? a. 325 km/h W b. 490 km/h W c. 980 km/h W d. 1960 km/h W Use the following number line to answer questions #12 through #14. A -7-6 -5-4 -3-2 -1 0 1 2 3 4 5 6 7 meters 12. What is the position of the moon ( )? a. 4 meters b. 4 meters 13. What is the position of the triangle ( )? a. 5 meters b. 5 meters 14. If a person walks from the triangle to the moon, what is his displacement? a. 9 meters b. 9 meters
Use the following scenario to answer questions #15 through #17. The cat and the dog start at point A. The cat takes off across the room and the dog follows. The dotted line represents the cat s path. The solid line represents the dog s path. The cat and the dog finish at Point. 10 meters Point A 5 meters Point A 15. What distance does the cat travel? a. 10 meters b. 5 meters c. 0 meters C 16. What is the dog s displacement? a. 5 meters b. 10 meters c. 5 meters right d. 10 meters right D 17. The dog and the cat both return to Point A by following a straight line path from point back to point A. What are their displacements for their entire trips? a. Cat= 10 meters, Dog = 5 meters b. Cat =20 meters, Dog = 10 meters c. Cat = 15 meters, Dog = 15 meters d. Cat = 0 meters, Dog = 0 meters
Fill in the Table Fill in the missing quantities in the table. Quantity Symbol Units Scalar or Vector Distance d m S Speed s m/s S Velocity v m/s Vector Time t s S Initial Position x i m V Final position x f m V Open Ended Questions 1. Compare and Contrast the following two vocabulary words: instantaneous speed and average speed. oth instantaneuos speed and average speed are a measure of how fast an object is going, Instantaneous speed is the speed at one instant or moment. Average speed is the speed over a whole trip on average, overall. 2. Give an example of an object traveling at a constant speed. How do you know it is traveling at a constant speed? A car driving down the hoghway is an example of an object traveling at constant speed. You know it is going at constant speed because the speedometer is still at 65 mph and the car is not speeding up or slowing down. 3. What are the three ways that you can change the velocity of an object? a. Speed Up b. Slow down Change direction c.
4. What are the three different tools or controls in a car that can change it s velocity? Gas Pedal a. b. rakes Steering Wheel c. 5. You are asked to determine the average speed of Ms. Winston sprinting down the soccer field. a. What tools do you need? No need to do problem number 5. ut you need to know how to find the slope of a line in a graph; lik ein the lab walk, jog, and speed up. b. What measurements will you make? How many times? c. Describe your procedure. Use complete sentences. 6. You are doing the Walk in the Park Lab. For a person walking 5m at a slow pace, here are the times that you record: Trial 1 2 3 Time 3.2 seconds 3.6 seconds 3.3 seconds Calculate the average time. SHOW YOUR WORK. Av. = 3.2 + 3.6 + 3.3 s/3 = 10.1 s/3 = 3.37 s
s = d t d = s t t = d s 1. Joe walks from one end of Main Street to the other. He walks at a rate of.5m/s. If we assume that Main Street is approximately 170 meters long, how long does it take Joe to walk from Elm to Hull? Solution:! What do you know: First, write the three variables and fill in the ones you know and put a question mark next to the one you do not know. s = 0.5 m/s d = t = 170 m? " Which equation should you use? Choose the equation & write it down (do NOT plug in numbers yet! t = d/s # Substitute and Solve: Now you may replace the symbols with the numbers from step 1 $ Final Answer: Write your final answer. Don t forget the units! t = 170m/0.5 m/s = 340s
s = d t d = s t t = d s 2. You can ride your skateboard at a top speed of 3m/s. How far can you go in 5 minutes (300 seconds)? Solution:! What do you know: First, write the three variables and fill in the ones you know and put a question mark next to the one you do not know. s = 3 m/s d = t =? 5 mins = 300 secs " Which equation should you use? Choose the equation & write it down (do NOT plug in numbers yet! d = st = 1500 m # Substitute and Solve: Now you may replace the symbols with the numbers from step 1 $ Final Answer: Write your final answer. Don t forget the units!
s = d t d = s t t = d s 3. What average speed does a rollercoaster have if it drops a distance of 20 meters in.3 seconds? Solution:! What do you know: First, write the three variables and fill in the ones you know and put a question mark next to the one you do not know. s =? d = t = 20 m 3 secs " Which equation should you use? Choose the equation & write it down (do NOT plug in numbers yet! s = d/t = 20m/3s = 6.67 m/s # Substitute and Solve: Now you may replace the symbols with the numbers from step 1 $ Final Answer: Write your final answer. Don t forget the units!