Here are the main points that will be addressed in the videos. Please read these and think about them as you watch.
- We notice an object’s speed by observing a change in position over an interval of time, but at single instant in time, speed cannot be observed.
- We can approximate an instantaneous speed with an average speed over an interval of time immediately before or after the moment in time.
- The average speed is typically either an over-estimate or an under-estimate of the instantaneous speed.
- If we compute both an over-estimate and an under-estimate, we can compute how much error there might be in our approximation.