PASCO ME-6855 Tension Protractor - Manual (Page 3)

Tension Protractor
ME-6855
®
1
Figure 1: Front view
Included Parts
• Tension Protractor
• String, 15 cm
• Wire hook
Other Parts Recommended
• 90 cm Steel Rod (PASCO part ME-8738)
• Large Table Clamp (ME-9472)
• Additional string (SE-8050)
• Hooked Mass Set (SE-8759)
Introduction
The Tension Protractor is used to measure string tension and angle simultaneously. It eliminates the need for separate
spring scales and protractors in equilibrium experiments.
About the Apparatus
The Tension Protractor consists of a torsion spring scale and a protractor.
The string is attached to the rotating part of the protractor and wrapped twice around a small pulley (see Figure 1).
When the string is pulled, the torsion spring stretches and the red pointer rotates. The string tension is read on the
To zero the angle scale,
rotate the outer ring
Force is indicated on the
inner scale, which is red to
match the red pointer
The string is secured
with a screw
The string is wrapped
around the center pulley
Angle is indicated on the
outer scale
A mass can be hung from
the wire hook