Adaptation of a Physlet problem to work as a calculated question within WebCT.
This question looks for the java archive files in the webct_install_dirwebctuserclasses subdirectory (i.e.,
Text of Learning Exercise:
The orgininal problem may be viewed at target=_blank> http://webphysics.davidson.edu/physletprob/ch8_problems/ch8_2_NetwonsLaws/newton8_2_4.html. A light block slides on top of a heavy block on a frictionless surface. An external force is applied to the light block, and friction causes the heavy block to accelerate.
The modification utilizes the random parameter feature of the WebCT calculated question format. The advantage here is that you can allow unlimited attempts and encourage collaboration. Since the parameters are re-randomized on each attempt,
it is appropriate to report the correct answer after an incorrect submission.
There are two parts to this problem. Part a asks for the coefficient of friction, and part b asks for the external force. Since WebCT does not provide a way to extend a given set of parameters over mulitple questions, the motion in part b is reversed.
Once you have the problem working, create a quiz that uses it. The quiz settings that I find most effective for this problem are
Highest score determines grade
Release the score once the quiz has been submitted