PASCO WA-9857 String Vibrator - Manual (Page 6)

String Vibrator Equipment Setup
6 ®
Vertical String
The vertical arrangement with
the elastic cord makes a good
classroom or lecture
demonstration. It requires a
vertical rod and a horizontal
component at the top of the
rod, such as a Pendulum Clamp
(SE-9443), to attach the elastic
cord. To adjust the length and
tension, move the top mount
vertically on the rod.
Horizontal String
The pictures below show the horizontal arrangement in two ways. Since the standing waves
produced sometimes vibrate in a plane, it may be necessary to rotate the case for the wave to be
visible.
In the orientation pictured on the left, the wave is visible from above, but
not as easily seen by a student sitting out in the classroom. As shown on the
right, the wave is visible from the side, which is most useful for
demonstrations.
Applying Tension to Inelastic String
When you use inelastic string, it is necessary to apply tension. This can be
accomplished with the string oriented horizontally, and with a hanging
mass, a pulley and a table clamp as shown here. The tension on the string is
equal to the weight of the hanging mass.