| A | B |
|---|
| 1. A high school athlete runs 100 m in 12.20 s. What is the velocity in m/s and km/h? | 8.197 m/s; 29.509 km/h |
| 2. A person walks 13 km in 2.0 h. What is the person's average velocity in km/h and m/s? | 6.5 km/h; 1.8 m/s |
| 3. While John is traveling along a straight interstate highway, he notices that the mile marker reads 260. John travels until he reaches the 150-mile marker and then retraces his path to the 175-mile marker. What is John's resultant displacement from the 260-mile marker? | -85 miles |
| 4. A physics book is moved once around the perimeter of a table of dimensions 1.0 m by 2.0 m. If the book ends up at its initial position, what is its displacement? What is the distance traveled? | 0 m; 6 m |
| 5. Light from the Sun reaches Earth in 8.3 min. The velocity of light is 3.00 x 10^8 m/s. How far is Earth from the Sun? | 1.494 x 10^11 m |
| 6. A cross-country runner runs 5.0 km east along the course, then turns around and runs 5.0 km west along the same path. She returns to the starting point in 40 min. What is her average speed? her average velocity? | 14.93 km/h; 0 km/h |
| 7. 0.30 s after seeing a puff of smoke rise from the starter's pistol, the sound of the firing of a pistol is heard by the track timer 100 m away. What is the speed of sound? | 333 m/s |
| 8. A bullet is fired with a speed of 720.0 m/s. What time is required for the bullet to strike a target 324 m away? What is the velocity in km/h? | 0.45 s; 2592 km/h |
| 9. An Indy-500 race car's velocity increases from 4.0 m/s to 36 m/s over a 4.0 s period. What is its average acceleration? | 8 m/s^2 |
| 10. A bus slows from 36 m/s to 15 m/s over 3.0 s. What is its average acceleration? | 7 m/s^2 |
| 11. Top fuel drag racers are able to accelerate at 12.5 m/s^2 from rest to 100 m/s before crossing the finish line. How much time elapses during the run? | 8s |
| 12. A race car accelerates from rest at 7.5 m/s^2 for 4.5 s. How fast will it be going at the end of that time? | 33.75 m/s |
