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. Swings must be hung at a height such that the 'flags', which are attached to the bottom of the mass holders, pass through the photogates. String length shorteners are pictured in the lab manual, and must be assembled using the slotted plastic plates attached to meter sticks, which are then mounted on lab stands. Photogates attach to gray plugs that go to 'Power' and to 'Digital In 1'. Try computer for correct operation if in doubt.