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. These should be set on a standing mass holder.
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. Spring scales should be calibrated when setting up lab. Photogates attach to gray plugs that go to 'Power' and to 'Digital In 1'. Use standard force probes if available.