There are a couple free experiments available for the Force Plate:
http://www.vernier.com/products/sensors/force-sensors/fp-bta/#section3

You may also be interested in these examples from our Caliper newsletter:

Egg Drop Competition:
http://www2.vernier.com/newsletters/fall04.pdf

Chest Protector study:
http://www.vernier.com/innovate/innovativeuse40.html

Space Science Labs:
http://www.vernier.com/innovate/innovativeuse39.html

Juggling:
http://www.vernier.com/innovate/innovativeuse42.html

The Volume of a Person:
http://www.vernier.com/innovate/innovativeuse49.html

Bridge Building:
http://www2.vernier.com/newsletters/spring05.pdf