If i have no velocity in one direction then there is no

AI Thread Summary
If there is no velocity in a specific direction, it does not necessarily imply that there is no acceleration in that direction. For example, a ball at the peak of its vertical throw has zero velocity but still experiences gravitational acceleration. The relationship between velocity and acceleration is context-dependent and varies based on the specific problem being analyzed. Understanding this distinction is crucial when dealing with dynamics, especially in fluid mechanics. Therefore, a lack of velocity does not equate to a lack of acceleration.
a_helal
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if i have no velocity in one direction then there is no acceleration ?
i deal with acceleration for sphere in fluid so i use spherical polar co ordinates (ρ,θ,Φ)
i have no velocity in Φ then there is no acceleration in Φ direction ?
i want to be sure
 
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Well you can't make that conclusion...imagine you have a ball thrown vertically...at the top it has no velocity but has acceleration g...so what I mean is that the current velocity in certain direction might be 0 but that does not mean that there is no acceleration in the direction...it depends on the problem of course :)
 
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ok thanks
i understood
 

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