Directions: Use the equation above to answer the following questions. Do not submit for grading. 1. A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast (what speed) were they running? 2. The pitcher's mound in baseball is 85 m from the plate. It takes 4 seconds for a pitch to reach the plate. How fast is the pitch? 3. If you drive at 100 km/hr for 6 hours, how far will you go? 4. If you run at 12 m/s for 15 minutes, how far will you go? 5. Every summer I drive to Michigan. It is 3900 km to get there. If I average 100 km/hr, how much time will I spend driving? 6. A bullet travels at 850 m/s. How long will it take a bullet to go 1 km? 7. Every winter I fly home to Michigan. It takes 5 hours. What is my average speed? 8. The fastest train in the world moves at 500 km/hr. How far will it go in 3 hours? 9. How long will it take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth. 10. It is 21,000 kilometers around the earth and the earth rotates in 24 hrs. How fast is it rotating? 11. A car goes from 0 to 100 km/hr in 10 seconds. What is its acceleration? 12. A bus slams on its breaks and goes from 30 km/hr to 15 km/hr in 4 seconds. What is its acceleration? Practice Activity 2 - Distance and Displacement Directions: For each question plot the path on the grid paper. 1. Joey drives his Skidoo 7 kilometers north. He stops for lunch and then drives 5 kilometers east. What distance did he cover? What was his displacement? 2. Anthony walks to the pizza place for lunch. He walks 1 km east, then 1 km south, and then 1 km east again. What distance did he cover? What was his displacement? 3. On his fishing trip Justin takes the boat 12 km south. The fish aren't biting so he goes 4 km west. He follows a school of fish 1 km north. What distance did he cover? What was his displacement? 4. Preston goes on a camel safari in Africa. He travels 5 km north, then 3 km east, and then 1 km north again. What distance did he cover? What was his displacement? 5. Neil pogo sticks to his science class. He travels 8 m east the 4 m north. What distance did he cover? What was his displacement? Practice Activity 3 - Displacement, Velocity, Acceleration Directions: Determine the following answers. Do not submit for grading. 1. A person starts at a position of 5.0km East of his house. After running for a period of time, he undergoes a displacement of 2.3km {East}. What is his new position? 2. A person is driving a car along a straight highway. The car's position at 9:00 am is 13 km to the East of his home. The car's position at 10:30 am is 137km to the East of his home. What is the displacement of the car? 3. A delivery person drives 83km North to pick up a package. Then he drives 34km South to deliver the package. a) What was the delivery person's distance traveled? b) What was the delivery person's displacement? Practice Activity 4 - Speed and Velocity (constant motion) Directions: Determine the following answers. Do not submit for grading. 1. A person walks 5.0km in 2.00h. Then he walks 1.5km in 0.50h. Finally he walks 10.0km {East} in 2.25h. a) What is the person's average speed for the journey? b) What is the person's average velocity for the journey? c) What is the person's instantaneous velocity at 1.00h? d) What is the person's instantaneous velocity at 2.25h? 2. A person drove 4.0km {North} and then 6.4km {South}. a) If the person's average speed was 65 km/h, how long did the trip take? b) What was the person's average velocity? 3. A person starts from home and drives with a velocity of 55km/h {East} for 30 minutes. The person then drives with a velocity of 73km/h {West} for 45 minutes. Where is the person now? 4. Two people start at the same location. One person jogs with a velocity of 3.5m/s {East} for 30 minutes. The other jogs with a velocity of 1.5m/s for 45 minutes. Where is each person? How far apart are they? 5. You plan a 200. km trip on which you want to average a speed of 90. km/h. You cover the first half of the distance at an average speed of only 48km/h. What must your average speed be in the second half of the trip to meet your goal? Practice Activity 5 - Basic Word Problems for Acceleration (constant acceleration) Directions: Answer each of the following questions. Do not submit for grading. 1. Myriam Bdard accelerates at an average of 2.5 m/s2 for 1.5 s. What is her change in speed at the end of 1.5 s? 2. A skateboarder rolls down a hill and changes his speed from rest to 1.9 m/s. If the average acceleration down the hill is 0.40 m/s2, for how long was the skateboarder on the hill? 3. Kerrin Lee-Gartner is moving at 1.8 m/s near the top of a hill. 4.2 s later she is traveling at 8.3 m/s. What is her average acceleration? 4. A bus with an initial speed of 12 m/s accelerates at 0.62 m/s2 for 15 s. What is the final speed of the bus? 5. A snowmobile reaches a final speed of 22.5 m/s after accelerating at 1.2 m/s2 for 17 s. What was the initial speed of the snowmobile? Review Directions: Answer each of the following questions. 1. What would a graph of the speed of an object that moves at a constant speed look like? (hint: curved line, broken line, etc.) 2. A car travels 120 km in 1250 seconds. What is the speed in kilometers per hour? 3. A kayak races 100 meters in 50 seconds. What is the speed of the kayak? 4. How far would you travel moving at 12 m/s for 3.00 minutes? 5. How long would it take to travel 50 km traveling at a speed of 10 km/hr? 6. What is the best definition for a frame of reference? 7. You ride the bus home each day. It takes 45 minutes to travel 100 kilometers. What is the speed in kph? 8. What is the acceleration of a rocket whose velocity increases from 15.0m/s to 45.0 m/s in 2 seconds? 9. What is a good definition for the Conservation of Energy? 10. An airplane taking off increases its velocity from 10.0m/s to 100.0m/s in 2.0 seconds. What is the acceleration? 11. Two cars, A and B, are 400 meters apart. Car A travels due east at 30 meters per second on a collision course with car B, which travels due west at 20 meters per second. How much time elapses before the two cars collide? 12. The amount of kinetic energy an object has depends on what? 13. What is the acceleration of a train that starts from rest and reaches the speed of 105m/s in 30.0 seconds? 14. The speed of a car is decreased uniformly from 30 meters per second to 10 meters per second in 4.0 seconds. What is the magnitude of the car's acceleration? 15. A moving object that does not vary its speed is said to be moving at average velocity, constant velocity, average speed, constant speed, or equilateral speed? Explain your