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I have a question about the names of parts in the formula for accelerating a partical using polar coordinates.

The formula for acceleration is:

a=a_{r}u_{r}+a_{[tex]\theta[/tex]}u_{[tex]\theta[/tex]}

where:

a_{r}=r"-r[tex]\theta[/tex]'^{2}

a_{[tex]\theta[/tex]}=r[tex]\theta[/tex]"+2r'[tex]\theta[/tex]'

In these two equations

r" occurs due to exdending or shortening the arm

r[tex]\theta[/tex]'^{2}occurs due to the centrifugal force

r[tex]\theta[/tex]" occurs due to the angular acceleration

but how is this term called? :2r'[tex]\theta[/tex]'

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# Kinematics of a particle - Curvilinear motion of cylindrical components

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