Calculating Speed, Velocity, Time, Distance Equations: Speed = Name Distance Time D Change in Velocity = Final velocity - Starting Velocity S T Directions: Use the equation above to answer the following questions. Show your work and include the units. Pay close attention to the difference between speed and velocity. Include a direction when needed. 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? 5. Every summer I drive to San Francisco. It is 3900 km to get there. If I average 100 km/hr, how much time will I spend driving? 2. The pitcher’s mound in baseball is 85 m from the plate. It takes 4 seconds for a pitch to reach the plate. What is the speed of the pitch? 6. A bullet travels at 850 m/s. How long will it take a bullet to go 1 km? 3. If you drive at 100 km/hr for 6 hours, how far will you go? 4. If you run a t 12 m/s for 15 minutes, how far will you go? 7. Every winter Jean flies from Wausau to Michigan. It takes 5 hours and is a distance of 330 km. What is her average velocity? 8. How long will it take light moving at 300,000 km/s to reach us from the sun? The sun is 150,000,000 km from earth 9. It is 40,000 kilometers around the earth and the earth rotates in 24 hrs. How fast is it rotating? 13. A car travels from Jane’s house to Target, a distance of 18 miles in 45 minutes. It remains at Target for 30 minutes at rest. The car then travels from Target to Slumberland, a distance of 5 miles, in 25 minutes. a. What was the total time elapsed for the total trip? 10. Data taken from the liftoff of the space shuttle shows that in the first 10.00 seconds, the shuttle travels a distance of 933 feet. What is the shuttle’s average velocity during this time period? b. What was the average speed for the trip (total distance/ total time)? 14. For a long time it was the dream of many runners to run faster than the “4-minute mile.” Now quite a few runners have achieved what once seemed an impossible goal. On July 2nd, 1988, Steve Cram of 11. A mousetrap-powered car can travel 20.0 meters in Great Britain ran a mile in 3.81 min. During his 15.0 seconds. What is the speed of the car? amazing run, what was Steve’s average speed in mi/min? 12. A really fast armadillo can cross a road that is 20.00 meters long in 10.0 seconds. What is the velocity of the armadillo? D S T
