Documenting current understandings about motion:
- (set up boards as tracks to repeat motion diagnostic; define detector at beginning of the motion)
- Advise them to use their charts of motion away from the detector to think about each segment of the track
- Give hint: mark equal segments on the vertical position vs time track to represent the equal lengths of the three segments of the track
- Write the type of motion along each segment (at rest at A, slow constant velocity on AB, speeding up on BC, fast constant velocity on CD, at rest at D)