'inertial' is a correct and valid word in written English.
It is an adjective, used to describe something that is not moving, or tending to remain unchanged. For example: "The inertial nature of the rock made it difficult to move."
It took four years (and $1 billion) just to tweak the vibration frequency of the current vehicle's four thruster rockets because they were interfering with its inertial measurement unit, says George Lewis, a researcher at Cornell University.There are other missile defences.
In order to hop, the inertial energy from each flywheel must be transferred to the robot's frame simultaneously.Some microgravity space hoppers using a similar system are known as "hedgehogs" because of their protective spikes.
The rover also sports inertial navigation, combining accelerometers and gyroscopes for noting movements, to compute its position relative to a known starting location.
That inertial information allows the rover, when it moves about Gale Crater in the future, to adjust the antenna relative to where it thinks Earth is, maintaining the DTE connection.
As Albert Einstein showed in his general theory of relativity, for ordinary matter inertial mass and gravitational mass are equivalent.
Both insects use the same method: they combine vision with an inertial guidance system.Inertial guidance relies on measuring the position of something that, because of its inertia, resists following the object it is part of.
That, with the addition of a bit of computer modelling, has shown them how dipteran inertial guidance works.Flies do it using input from hundreds possibly thousands of sensors.
Flies use a pair of tiny organs called halteres that have evolved from the animals' hind wings and are shaped like balls on sticks.Several groups of researchers are looking into insect inertial guidance.
Assuming all the reciprocating parts in an engine are machined so as to weigh precisely the same, and the firing order is arranged so that every piston at the top of its stroke is matched by a corresponding one at the bottom, then the primary inertial forces caused by the pistons changing direction at the top and bottom of their reciprocating motion can be made to balance one another.
In the short run inflation oscillates because of idiosyncratic movements in various components, such as rent, health care and imported commodities, but over longer periods, it is remarkably inertial: the best forecast of inflation over the next five years is inflation over the past five years.
In a typical crash, the initial jolt would cause the air-bags to inflate, the seat-belts to lock, inertial switches to cut off the fuel supply, and the vehicle's crumple zones to deform in a predefined manner, so as to absorb the energy of impact.
