# per second per second

: per second every second
used of acceleration

## Examples of per second per second in a Sentence

Recent Examples on the Web Using that value for the initial speed and a time of 36 seconds gives an acceleration of 0.75 meters per second per second. WIRED, 29 Sep. 2023 When the field was slowly ramped down, the anti-hydrogen atoms drifted down like maple leaves in October and at the same rate of downward acceleration, or g force, as regular atoms: about 32 feet per second per second. Dennis Overbye, New York Times, 27 Sep. 2023 Milgrom noticed that in diffuse systems like this, Newton’s laws begin to falter — and make untrustworthy predictions — whenever gravitational acceleration dips below a specific threshold, 10-10 meters per second per second, 100 billion times weaker than the force of gravity felt on Earth. Steve Nadis, Discover Magazine, 27 May 2015 The nice thing about projectile motion is that once the ball is in the air, its horizontal velocity is constant and the acceleration in the vertical direction is –9.8 meters per second per second. Rhett Allain, WIRED, 23 Dec. 2022 So, if a car goes from 10 meters per second to 20 m/s in a time of 1 second, that car would have an acceleration of 10 meters per second per second. WIRED, 11 Nov. 2022 An acceleration of 1 meter per second per second (m/s2) says that the speed of an object will change (either increase or decrease) by 1 m/s every second. WIRED, 25 Sep. 2022 So, an acceleration of 0 meters per second per second means that the velocity won't change. Rhett Allain, Wired, 11 Feb. 2022 However, with a downward-pulling gravitational force, Drake should have a vertical acceleration of -9.8 meters per second per second (due to the gravitational field). Rhett Allain, Wired, 26 Nov. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'per second per second.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

## Word History

First Known Use

1916, in the meaning defined above

Time Traveler
The first known use of per second per second was in 1916

## Dictionary Entries Near per second per second

per second per second

## Cite this Entry

“Per second per second.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/per%20second%20per%20second. Accessed 25 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!