Free Fall Sensor

Free Fall Sensor

Free Fall Sensor :
Provide a full setup to calculate rectiligne mouvements of a free fall body.
Equivalent or better alternatives technically and pedagogically may be accepted.
Photogate-Pulley System:
Measures linear and rotational motion
Provide photogate and pulley
Spatial resolution : <1 mm
Timing resolution : +/- 0.1 millisecond
Picket fence:
5 opaque bands patterns,  or equivalent
Bands mounted on a rectangle of clear plastic
Distance between opaque bands >2cm.