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# What are the three types of acceleration?

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### Quick Answer

In physics, the three types of acceleration are changes in speed, direction and both simultaneously. The word "velocity" is often used in place of speed. A person can calculate the acceleration of an object by determining its velocity and the length of time it accelerates.

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### Full Answer

When a car makes a sudden turn, it experiences an increase in acceleration, even if its speed remains constant. This increase in acceleration can be felt through the jerking effect that is imposed on the passengers' bodies. In addition to regular acceleration, an item can experience negative acceleration, which is characterized by a decrease in speed. The intended direction of an object may remain positive regardless of its velocity rate.

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## Related Questions

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There is no such thing as a formula for deceleration; there is only a formula for acceleration. To find the acceleration, subtract the initial velocity from the final velocity and divide that sum by the time taken. If that formula yields a negative answer, it indicates a negative acceleration, or deceleration.

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Speed and velocity are similar in that they are measured in the same measurement units, which are meters per second. However, velocity and speed are very different quantities because one has a direction and the other one does not.

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There are three types of acceleration in general: absolute acceleration, negative acceleration and acceleration due to change in direction. Acceleration is defined as the rate of change of velocity.

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The speed of an object is equal to the distance it travels divided by the amount of time it takes to travel the distance. This actually measures the average speed; instantaneous speed is the speed of an object at a given instant (as the time period approaches zero).

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