What is the Translational Acceleration at a Point on the Rim at t=10?

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SUMMARY

The discussion centers on determining the translational acceleration at a point on the rim of a rotating object at time t=10. Participants clarify that translational acceleration refers to the acceleration of the center of mass, contrasting it with rotational acceleration. The formula a = (r)(alpha) is debated, with suggestions that the term may imply tangential acceleration or the resultant of tangential and centripetal accelerations, expressed as a = (a_t^2 + a_c^2)^(1/2).

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studentofphy
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I have a physics problem that is asking about translational acceleration... it says this:

"What is the magnitude of the translational acceleration at a point on the rim at t=10?"

Is this referring to a=(r)(alpha)

or is it referring to:

a=(a_t^2+a_c^2)^1/2
 
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hi studentofphy! :smile:
studentofphy said:
"What is the magnitude of the translational acceleration at a point on the rim at t=10?"

hmm … "translational acceleration" is normally used as being the opposite of "rotational acceleration" …

it applies to a rigid body, and it means the acceleration of the centre of mass, as opposed to the angular acceleration about the centre of mass

i honestly don't see how you apply it to a point :redface:

my guess is that it means "transverse acceleration" (ie "tangential acceleration")

but it could mean the full acceleration (since obviously the angular accelearrtoin of a point about itself is irrelevant)​
 

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