Transition notes :

1. All of the rotational equipment from lab 10 is to be removed.
2. The RMS needs to be removed from the “A” base.   All RMS in storage that already have string attached should be used and take away the RMS from the previous lab. Then, leave out the number left that there isn't enough already with string to be strung.
3. The mass set is not needed but can be left out for lab 12.
4. Calipers also remain out.

Equipment list:

1. Pasco 750 Lab interface with the following sensors:
   • RMS (yellow DG1, black DG2) with pulley and string already attached (C3.1)
     on 90 cm rod (A1) and “A” base (C20.1)
   • Force probe (C3.2) with hook (Analog A)
2. Pasco Torsional Pendulum kit (C9.1)
   • Disk
   • Hoop
   • 3 wires of different diameter with 90 degree bends in each end
   • Bottom wire support block
   • Top wire support for RMS shaft.
   • String with loops tied in the end to wrap around large RMS pulley.
3. Vernier caliper (C9.4)
4. Electronic Balance (1000 g capacity) (A3.3)

Notes and Tests:

1. Pulley should be mounted on the side without the PASCO logo.
2. Mount the disk on top of the pulley with the screw presently holding the pulley.
3. If string needs attaching to more pulleys follow the instructions from lab 10. Wrap the string around the largest pulley so that it comes out from the back
   side which results in the pulley spinning clockwise when the string is pulled.
4. Do initial setup with thinnest wire: tighten bottom wire support on wire
   first, then tighten top wire support on wire, then move RMS down until it sits just in
   the top wire support so that the wire is straight but firm, and not falling off.
5. Take calipers out of their boxes and return the boxes to the storage room
   somewhere that it will be easy to remember which ones are empty.
6. Level A-bases
7. Start the test file “2305_Lab11_Torsion_test1.ds” in the setup files. Hook the force probe to the string, start collection, and gently pull away from the setup with the string coming from around back. When tested there should be a positive linear slope on the angular position vs. applied force graph.