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Essentially, a gyroscope is a top combined with a pair of gimbals. Tops were invented in many different civilizations, including classical Greece, Rome, and China. [5] Most of these were not utilized as instruments. The first known apparatus similar to a gyroscope (the "Whirling Speculum" or "Serson's Speculum") was invented by John Serson in ...
Torque-induced precession (gyroscopic precession) is the phenomenon in which the axis of a spinning object (e.g., a gyroscope) describes a cone in space when an external torque is applied to it. The phenomenon is commonly seen in a spinning toy top , but all rotating objects can undergo precession.
In some regions, the couple walks around the altar seven times. In other regions, the couple takes seven steps to complete a single circumambulation. Each of the seven has a different meaning. At each step or circuit, the couple may also take vows. [3] Vows made in the presence of the sacred fire are considered unbreakable, with Agnideva (lit.
Precession of a gyroscope. In a similar way to how the force from the table generates this phenomenon of precession in the spinning gyro, the gravitational pull of the Sun and Moon on the Earth's equatorial bulge generates a very slow precession of the Earth's axis (see §Cause). This off-center push or pull causes a torque, and a torque on a ...
Some sources attribute the roll to gyroscopic precession, [5] [1] however this is not correct: gyroscopic precession always results in a shift of 90 degrees, whereas phase lag can be less than 90 degrees. [3]: 2–28 Gyroscopic precession applies only to rigid systems, but helicopter rotors are not rigid as they are designed to flap up and down.
The trivial case of the angular momentum of a body in an orbit is given by = where is the mass of the orbiting object, is the orbit's frequency and is the orbit's radius.. The angular momentum of a uniform rigid sphere rotating around its axis, instead, is given by = where is the sphere's mass, is the frequency of rotation and is the sphere's radius.
Axial parallelism (also called gyroscopic stiffness, inertia or rigidity, or "rigidity in space") is the characteristic of a rotating body in which the direction of the axis of rotation remains fixed as the object moves through space.
A gyroscope is an essential component of a gyrocompass, but they are different devices; a gyrocompass is built to use the effect of gyroscopic precession, which is a distinctive aspect of the general gyroscopic effect. [2] [3] Gyrocompasses, such as the fibre optic gyrocompass are widely used to provide a heading for navigation on ships. [4]