1. | A group of bike riders took a 4.0-hour trip. During the first 3.0 hours, they traveled a total of 50. kilometers, but during the last hour they traveled only 10. kilometers. What was the group's average speed for the entire trip? |
A. |
B. |
C. |
D. |
2. | One car travels 40. meters due east in 5.0 seconds, and a second car travels 64 meters due east in 8.0 seconds. During their periods of travel, the cars definitely had the same |
A. |
B. |
C. |
D. |
3. | The speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. The magnitude of the car's acceleration is |
A. |
B. |
C. |
D. |
4. | A car having an initial velocity of 12 meters per second east slows uniformly to 2 meters per second east in 4.0 seconds. What is the acceleration of the car during this 4.0-second interval? |
A. |
B. |
C. |
D. |
5. | Two cars, A and B, are 400. meters apart. Car A travels dueeast at 30. meters per second on a collision course withcar B, which travels due west at 20. meters per second. Howmuch time elapses before the two cars collide?1) 2) 8.0 s3) 20. s4) 40. s |
A. |
B. |
C. |
D. |