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en.wikipedia.org/wiki/Acceleration

In the absence of air resistance and thus terminal velocity, a falling ball would continue to accelerate.

medical-dictionary.thefreedictionary.com/acceleration-deceleration+injury

acceleration-deceleration injury Brain injury caused by blows, MVAs/RTAs, etc., which is a major cause of brain morbidity, resulting from the abrupt movement and deformation of the brain in the cranial cavity.

sciencing.com/calculate-deceleration-6081657.html

Deceleration means slowing down, the opposite of acceleration. Deceleration may be calculated using either the time or the distance over which the change in speed occurs. Deceleration may be expressed in gravitational units (G).

www.britannica.com/science/deceleration-injury

Acceleration and deceleration forces can be measured in terms of gravitational acceleration (g). A force of three g, for example, is equivalent to an acceleration three times that of a body falling near the Earth. Factors that influence the effects of deceleration are the initial rate of speed, the distance covered and time consumed in ...

www.ncbi.nlm.nih.gov/pmc/articles/PMC155415

To discuss a newtonian physics model for understanding and calculating acceleration-deceleration forces found in sport-related cerebral concussions and to describe potential applications of this formula, including (1) an attempt to measure the forces applied to the brain during acceleration ...

pediaa.com/difference-between-acceleration-and-deceleration

Deceleration is a negative acceleration. Direction of Forces. Acceleration happens when there is a resultant force on an object, in any direction. Deceleration takes place when a resultant force acts on an object in the direction opposite to the direction in which it is moving. Non-technical Usage. In everyday terms, an acceleration refers to ...

www.physicstutorials.org/home/mechanics/1d-kinematics/acceleration

acceleration deceleration with examples. ACCELERATION. Definition of acceleration is a little bit different from speed and velocity. We can easily define acceleration as “change in velocity”.As you understood from the definition there must be change in the velocity of the object.

www.physicsforums.com/threads/calculation-of-force-from-deceleration.535359

To a physicist -- and in the "mass x acceleration" formula you wrote -- acceleration refers to any rate of change in velocity. Deceleration is just a special case of acceleration, where the speed of the object is decreasing.

www.livescience.com/46560-newton-second-law.html

The product of mass times gravitational acceleration, mg, is known as weight, which is just another kind of force.Without gravity, a massive body has no weight, and without a massive body, gravity ...

www.braininjuryeducation.org/TBI-Basics/Mechanisms-of-Injury

External mechanical forces that can cause TBI. Blow to head (e.g., fall onto pavement, head impacting windshield in a car accident, assault, baseball striking head) Acceleration-deceleration forces, wherein no direct impact is required (e.g., a restrained passenger coming to a sudden stop when a car strikes a tree or telephone pole)