PASCO ME-6855 Tension Protractor - Manual (Page 5)

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T e n s i o n P r o t r a c t o r S t r i n g R e p l a c e m e n t
3
String Replacement
The Tension Protractor is designed for use with Braided Physics String (PASCO part
SE-8050). Using string of a different diameter will cause error in the force reading. Follow
these steps to replace the string.
1. Use a #0 or #1 phillips screwdriver to remove the screw on the face of the Tension
Protractor.
2. Remove the old string.
3. Tie a loop at the end of the new string.
4. Put the screw through the loop and replace the screw in the face of the protractor.
5. Wrap the string twice around the pulley in the clockwise direction.
6. Tie the wire clip to the end of the new string. If the wire clip is lost, it can be replaced
with a small paper clip.
About the Experiments
The experiments in this manual use one or two Tension Protractors and other equipment,
such as rods, clamps, and masses that are commonly found in introductory labs.
1. Static Equilibrium with Unequal Angles (page 4): Examine the forces required
to hang a weight in static equilibrium using two strings at different angles.
2. Boom in Static Equilibrium (page 7): Examine the two requirements for a boom
in equilibrium. The boom is pivoted at one end and a string suspends the other end.