Velocity - Angular Converter

Angular velocity is a vector that indicates the speed of rotation of an object about an axis. The direction of this vector is normal to the plane of rotation and is determined by the right-hand rule. It is measured as a ratio between the change of an angle through which this object traveled, called angular displacement, and time. The SI unit for angular velocity is radians per second.
Angular Velocity in SportsAngular velocity is a useful concept in sports.
For example, knowing and being able to control angular as well as the linear velocity of a golf club, a bat, or a racket during the swing may help the athlete with improving their performance. A relationship between angular and linear velocity is such that for an elongated object such as a golf club the point furthest from the rotational axis has the fastest linear velocity, even though the angular velocity is the same at any point along the club. Thus, using a longer club, bat, or racket the athlete can propel the ball with a greater linear velocity, allowing it to travel a longer distance before it falls. Conversely, using a shorter racket or holding it up the grip in a way that shortens it allows the athlete to reduce the linear velocity.

Angular Velocity in Optical Storage
The disks in hard disk drives are spun at speeds varying from 4,200 rpm in energy-efficient portable devices, to 15,000 rpm for high-performance serversAngular velocity is used in data storage on optical media such as CDs. Both angular and linear velocities are used to measure the writing speed of discs and the speed of the disc drives. Different velocity is important in different recording modes, and the names of these modes often refer to velocity. For example, Constant Linear Velocity (CVL) method was the original recording mode. In this mode, data is written at a uniform rate through the entire disc. Zone Constant Linear Velocity (ZCLV) maintains a constant linear velocity in a given zone of the disc, not throughout the entire disc. The disc usually spins slower while recording on its outer areas. Partial Constant Angular Velocity (PCAV) is a recording method of gradually increasing the angular velocity until a certain threshold is reached. It then remains constant for the rest of the recording. Finally, Constant Angular Velocity (CAV) is a recording mode that maintains the angular velocity constant during the recording. This means that the linear velocity increases as the writing head moves to the outer areas of the disc. This method is also used in hard drives and gramophone records.

Angular Velocity in SpaceGeostationary orbitThere is an orbit located 35,786 kilometers (22,236 miles) away from the Earth; an object following this orbit in the same direction as the rotation of the Earth completes it in approximately the same amount of time that it takes the Earth to rotate about its axis — one sidereal day, which is a little bit less than 24 hours. Thus, the angular velocity of the objects on this orbit is equal to the angular velocity of the Earth. Because of that, these objects look stationary to a viewer on Earth. This orbit is called a geostationary orbit.It is used for satellites that monitor changes in the Earth’s weather and climate (weather satellites), changes in the oceans (Geostationary Ocean Color Imagers or GOCIs), and communication satellites, used for broadcasting and communication.

Communication satellites can stay on lower or higher orbits as well. Geostationary orbits are often used because the antennas pointed at a satellite on this orbit would not have to be re-pointed. However, if the transmitter’s direct line of sight is blocked, the signal will not be transmitted well, if at all. Geostationary orbit is far, and as a result, it causes a delay of about 0.25 seconds. Stronger transmitters are needed to address the issue of distance as well. Historically communication satellites were used for long-distance telephone communications. They have been replaced in large part by marine cross-continental cables laid over the ocean floor, but are still used in this capacity for remote areas. In the past 20 years, communication satellites have also been used to provide internet connectivity in remote locations.Satellite dishesSatellites have a set amount of fuel, and once they use all of it, they cannot be used anymore. They are generally taken to a different orbit, called a disposal or a graveyard orbit, which is much higher than the geostationary one. Because of this most countries have regulations that require private satellite owners to sign an agreement that they will move the satellite to the disposal orbit once it is near the end of its life cycle.

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Torque or Moment of Force - Online Converter
Torque or moment - the tendency of a force to rotate an object around an axis or a point - is defined asthe product of the force and the distance from the point or axis to the force vectorTorque can be expressed asT = F a                               (1)whereT = moment - or torque of the force (Nm, lbf ft)F = applied force (N, lbf)a = moment arm (m, ft)Example - Torque exerted by a WrenchA force of 250 N is acting at the end of a 30 cm long wrench. The torque exerted can be calculated asT = (250 N) (30 cm) (0.01 cm/m)   = 75 Nm

The Law of Lever is a torque balance on a stationary object and can be expressed asF1 / F2 = L2 / L1                                         (2)whereF = force (N, lbf)L = distance from the point (1 or 2) to the force vector (m, ft)(1) can be transformed toF1 L1 = F2 L2                                       (2b)orT1 = T2                                           (2c)Example - LeverA person with a mass of 90 kg is standing on one side of a lever 2 m from the balance point. The force on the other side of lever 0.5 m from the balance point can be calculated by modifying (2) toF2 = F1 L1 / L2    = (90 kg) (9.81 m/s2) (2 m) / (0.5 m)    = 3531 N

Moment of force (also called torque or just moment) is the tendency of a force to twist or rotate an object. A moment is the product of the force and the moment arm. The moment arm is the perpendicular distance from the point of rotation, to the line of action of the force. The moment may be thought of as a measure of the tendency of the force to cause rotation about an imaginary axis through a point.In SI, the moment of force is measured in newton-meter (N·m). One newton meter is equal to the torque resulting from a one-newton force applied perpendicularly to a one-meter long moment arm. In CGS, the moment of force is measured in gram-force centimeter (gf·cm).Using the Moment of Force Converter ConverterThis online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for engineers, translators, and for anyone whose activities require working with quantities measured in different units.

You can use this online converter to convert between several hundred units (including metric, British and American) in 76 categories, or several thousand pairs including acceleration, area, electrical, energy, force, length, light, mass, mass flow, density, specific volume, power, pressure, stress, temperature, time, torque, velocity, viscosity, volume and capacity, volume flow, and more.
Note: Integers (numbers without a decimal period or exponent notation) are considered accurate up to 15 digits and the maximum number of digits after the decimal point is 10.In this calculator, E notation is used to represent numbers that are too small or too large. E notation is an alternative format of the scientific notation a · 10x. For example: 1,103,000 = 1.103 · 106 = 1.103E+6. Here E (from exponent) represents “· 10^”, that is “times ten raised to the power of”. E-notation is commonly used in calculators and by scientists, mathematicians and engineers.In the list on the right, select the unit to convert from.Enter the value (for example, “20”) into the corresponding input box.The results of the conversion will immediately appear in all unit boxes.Find the unit to convert to in the list and read the calculated value.Alternatively, you can enter the value into any right input box, and the results of the conversion will be immediately recalculated.We work hard to ensure that the results presented by TranslatorsCafe.com converters and calculators are correct. However, we do not guarantee that our converters and calculators are free of errors. All of the content is provided “as is”, without warranty of any kind.

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