Use three 100's and two 50's at each station. Unless motion probes are attached to Port 2 students should go to 'collect' and then turn on 'Force only data'. Inform students to leave carts set up this way. One roll of tape is sufficient. Masking tape will probably leave less residue on the carts.
Hooked masses are preferable for use as hanging masses.
Set one 50g and one 100g mass at each station if available. Motion detectors attach to Port 2. Strings must be of a length such that the hanging mass will pull the cart throughout the distance that the mass falls. Swings consist of holders for slotted masses to which are attached long strings at each end. These strings have hooks attached to their ends so that they may be hung from the overhead fluorescent light fixtures.