Why changing direction is just as much acceleration as speeding up
In short: Most people associate acceleration solely with gaining speed. This video clarifies the physics of motion by exploring how changes in both magnitude and direction define true acceleration.
Acceleration is defined as the rate at which velocity changes over time, measured in meters per second squared (m/s²). Because it is a vector quantity, its behavior depends on the relationship between velocity and acceleration directions.
The video explains that an object speeds up when these two vectors align. Conversely, if they point in opposite directions, the object slows down. Crucially, any change in direction—even at a constant speed—constitutes acceleration.
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Sources
- Summary by Intellect · source: Acceleration | AP Physics | Khan Academy
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