| Statement | Acceleration | No Acceleration |
|---|---|---|
| A box travels on a conveyor belt that is moving at a constant speed. | × Incorrect |
✔ There is no acceleration. The conveyor belt would move in one direction at a constant speed. |
| A car travels on a winding road at a constant speed of 60 miles per hour. | ✔ There is acceleration. If the car is driving on a winding road, there is a change in direction. |
× Incorrect |
| Dalton swims laps in the pool at an average of 2 laps per minute. | ✔ There is acceleration. By swimming laps, he is changing direction, and we are given his average speed. |
× Incorrect |
| A rocket travels straight up at 10,000 kilometers per hour. | × Incorrect |
✔ There is no acceleration. The rocket is traveling straight up and is moving at a constant speed. |
| Robert runs around the block at an average speed of 8 miles per hour. | ✔ There is acceleration. Robert is changing direction, by going around the block, and he is also changing speed, since we are given his average speed. |
× Incorrect |
| Sue rides the escalator to the third floor of the mall. | × Incorrect |
✔ There is no acceleration. She is traveling up, and it can be assumed that an escalator would travel at a constant speed. |
| Angela runs on a treadmill at a constant speed of 10 miles per hour. | × Incorrect |
✔ There is no acceleration. Since she is on a treadmill, she is running at a constant speed and moving in the same direction. |
| Kathryn is stopped at a stop light. When the light turns red, she drives 45 miles per hour westward. | ✔ There is acceleration. She was stopped at the red light, so her speed would have to increase from zero to 45 miles per hour. |
× Incorrect |