Help i can't really understand

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If a car's velocity is constant, its acceleration is zero, as acceleration is defined as the change in velocity over time. The derivative of a constant function is zero, meaning there is no change in velocity. Velocity refers to speed in a straight line, and constant velocity indicates no acceleration. Understanding derivatives is not essential for basic physics, especially if calculus has not been introduced yet. The discussion clarifies that constant velocity equates to zero acceleration.
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what is the acceleration of a certain car if the velocity is constant?? is it zero?
 
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The acceleration is the derivative of the velocity respect to time so if the velocity is constant, the acceleration would be 0 (m/s^2) (as the derivative of a constant is 0)
 
what's the meaning of derivative?
 
dyenz said:
what's the meaning of derivative?

Velocity is speed in a straight line. If the velocity is constant, there is no change in velocity, which is what acceleration is, so acceleration is 0 by definition. (Unless your teacher is very sneaky and is talking about the acceleration due to gravity.)

Derivatives are not necessary for this level of physics. Apparently you haven't had calculus, yet.
 
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