# What Is Deceleration?

Deceleration is the opposite of acceleration. Acceleration speeds up an object. Deceleration slows that object down. It's like slowing down on a bike or in a car. The vehicle looses speed.
Q&A Related to "What Is Deceleration"
 Deceleration refers to a decrease in speed. Deceleration can also refer to a decrease in fetal heart rate, which may indicate an issue with blood flow. http://www.ask.com/web-answers/Science/Physics/wha...
 Deceleration:1:a decrease in rate of change; 2:physics) a rate of decrease in velocity; 3:the http://www.chacha.com/question/what-is-deceleratio...
 deceleration: a decrease in rate of change; (physics) a rate of decrease in velocity; the act of decelerating http://www.kgbanswers.com/what-is-a-deceleration/1...
de·cel·er·ate
[dee-sel-uh-reyt]
VERB (USED WITH OBJECT) [DE·CEL·ER·AT·ED, DE·CEL·ER·AT·ING.]
1.
to decrease the velocity of: He decelerates the bobsled when he nears a curve.
2.
to slow the rate of increase of: efforts to decelerate inflation.
VERB (USED WITHOUT OBJECT) [DE·CEL·ER·AT·ED, DE·CEL·ER·AT·ING.]
3.
to slow down: The plane decelerated just before landing.
Source: Dictionary.com
Deceleration is when motion is slowed down to a stop. Using a car as an example - you press the gas pedal to accelerate and then press the brake pedal to cause deceleration. ChaCha!
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The rates of deceleration are always expressed as Negative velocity and positive acceleration are deceleration, the rate of which is always a negative number. ...