'instantaneous speed' is a correct and usable phrase in written English.
You can use it to describe the exact speed at which something is traveling at any given moment. For example, "The instantaneous speed of the race car measured 120 mph."
The resulting trajectories were smoothed and used to calculate the instantaneous speed of the worm's centroid (1 s binning).
Note that Vmean is defined as the averaged instantaneous speed including all time steps, whereas Veff takes into account only the initial and final positions.
Brilliant Pebbles is now being revived by President Bush, but given the instantaneous speed of lasers, it may soon be joined by a companion technology.
Projecting a series of data visualizations on the screen, Ressa illustrated the nearly instantaneous speed with which attacks on the media spread globally via Facebook and Twitter.
A fly was classified as having jumped if its instantaneous speed exceeded a 75 mm s−1, a threshold identified by a discontinuity in the speed distribution.
If dogs deviated more from a straight path, then instantaneous speed would tend to be higher than that predicted from distance covered over the 30-s period.
Adjustment to load changes involves changes in the angle by which the rotor field lags the stator field and thus involves short-term changes in instantaneous speed.
To determine the object's instantaneous speed after precisely one second, its average speed over successively shorter time intervals will be calculated.
Obviously, as h approaches zero, this average speed approaches 2. Therefore, the definition of instantaneous speed is satisfied by the value 2 and only that value.
Moreover, a preliminary analysis of the effect of instantaneous speed and acceleration on real drive emissions is presented.
From a graph such as Figure 1, which shows how x depends on t, one may deduce the instantaneous speed of the ball at any instant.
