This activity was adapted from http://paer.rutgers.edu/pt3/experiment.php?topicid=13&exptid=138 accessed 10.51 am 18/01/2014

A ball is placed on a golf tee attached to the end of a plank on a hinge, as shown on the right. The plank is held at an angle by as tick. The stick holding up the plank is suddenly removed and the plank is allowed to fall. Predict where the ball will land.

Make sure you do not watch the video before you make a prediction.

Explain how you arrived at your prediction and write it down.

Explain how you arrived at this prediction.
Outline all the assumptions you have made.

Now click on the video below to see the experiments.

Click to view the video on the left to see the experiment

1) Was your prediction correct?

2) If the outcome did not match your prediction, should you modify the:

- fundamental ideas? Explain how

- assumptions? Explain why