Pendulums are often used as tools for spiritual healing and inner growth. Defined as objects attached at the end of a string or metal chain, when suspended from a stationary position, a pendulum will swing back and forth or in a circular motion. The typical image of a pendulum is that of an object with four metal balls, such as that on an employee's desk, also known as Newton's pendulum. Alternatively, the image of a pendulum watch clock swinging back and forth may ring a bell. Pendulums are made from a variety of materials including crystals, wood, glass, and metals. The general consensus within the healing community is that using a wooden pendulum on a thread is the preferred option for receiving the greatest clarity. This is because both crystals, gemstones, and metals tend to absorb energies which could cloud or influence information.
Pendulum Swings Respond to Questions
Pendulum are an Australian drum and bass band founded in The group is notable for its distinctive sound, mixing electronic music with hard rock and covering a wide range of genres. The debut studio album, Hold Your Colour , was released in to positive critical reception. While Hold Your Colour was mostly of the drum and bass genre, the succeeding albums In Silico and Immersion saw experimentation of other genres such as industrial rock and electronic rock. In August , Swire announced that a new album may be released in ,  although Swire and McGrillen later confessed on their Reddit AMA that they had become disillusioned with Pendulum and have no interest at present in producing any new material. Before Pendulum, Rob Swire and Gareth McGrillen were in multiple rock and metal music bands before Swire influenced McGrillen into producing electronic music on their computers. Harding had been the drummer in a punk band since the mid s. Both their bands had played together at the same shows, but they did not meet until a drum and bass night in Harding had been active in the Perth drum and bass scene for some time, DJing under the name "El Hornet".
A simple pendulum is one which can be considered to be a point mass suspended from a string or rod of negligible mass. It is a resonant system with a single resonant frequency. For small amplitudes, the period of such a pendulum can be approximated by:. Note that the angular amplitude does not appear in the expression for the period. This expression for period is reasonably accurate for angles of a few degrees, but the treatment of the large amplitude pendulum is much more complex. If the rod is not of negligible mass, then it must be treated as a physical pendulum.
Earlier in this lesson we learned that an object that is vibrating is acted upon by a restoring force. The restoring force causes the vibrating object to slow down as it moves away from the equilibrium position and to speed up as it approaches the equilibrium position. It is this restoring force that is responsible for the vibration. So what forces act upon a pendulum bob? And what is the restoring force for a pendulum? There are two dominant forces acting upon a pendulum bob at all times during the course of its motion. There is the force of gravity that acts downward upon the bob. It results from the Earth's mass attracting the mass of the bob. And there is a tension force acting upward and towards the pivot point of the pendulum. The tension force results from the string pulling upon the bob of the pendulum.