|WAVES AND OSCILLATIONS - OSCILLATIONS - LISSAJOUS FIGURES||Order|
Lissajous Sand Pendulum
Description: This apparatus consists of a heavy plastic cone-shaped vessel supported by 3 cords. These 3 cords are tied to two cords which form the support for the pendulum. A ring which may be moved along the cords so as to bring them together any place between the point of support and the cone. By this means a double pendulum is made which can be given vibrations in two different directions.
The pendulum may be made to swing in two different planes and to swing with two different periods. One plane of swing is fixed and is determined by the supporting of the two cords. The other plane of swing may be made anything desired by the operator but is usually made to swing at right angles to the upper plane. The period of the swing of the lower pendulum and the upper pendulum depends upon the location of the movable collar. The periods of the two swings may thus be adjusted to any desired ratio. some very interesting sand patterns may be obtained which illustrate the result of combining two harmonic motions of different periods.
Home Manual Demo Suggestions
NCSU Physics Demonstrations
© 2010, North Carolina State University Department of Physics. The design of this site nor the
contents may be copied without the express written permission of the NC State University Department of Physics.
North Carolina State University
All Rights Reserved, 2011