1. What is your average speed if:
   1. you travel at 20 meters per second for 2 minutes, and at 15 meters per second for 2 minutes?
   2. you travel at 20 meters per second for 2 minutes, and at 15 meters per second for 5 minutes?
2. Suppose that the equation $x(t ...

1. In the crash of a fighter jet, an object travelling approximately 700 miles per hour (~350 meters per second) is brought to rest in about 1.5 seconds. What acceleration is required to stop the jet's motion ? What could you compare this number to to get a sense ...

Velocity changes position, acceleration changes velocity