Translational Motion/Equilibrium vs. Rotational Motion/Equilibrium

[TinaBina22]

Can someone just please explain the difference between these two? I keep learning them from both Kaplan and TBR, but there are so many different aspects to them that I keep forgetting. I just want the nitty gritty basic facts that I can memorize and remember forever.

In the past, on that which shall not be named, there was a question regarding these concepts and it completely freaked me out because I couldn't apply them to a situation. So I want it down solid, just in case.

Thanks!!!

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[railgun]

Can someone just please explain the difference between these two? I keep learning them from both Kaplan and TBR, but there are so many different aspects to them that I keep forgetting. I just want the nitty gritty basic facts that I can memorize and remember forever.

In the past, on that which shall not be named, there was a question regarding these concepts and it completely freaked me out because I couldn't apply them to a situation. So I want it down solid, just in case.

Thanks!!!

Translational equilibrium is basically when the object has no net acceleration. For example, if a rocket is moving in space without drag and its engines are off, it is in translational equilibrium. (constant velocity, may or may not be 0)
Rotational equilibrium is basically the same thing, but rotationally. So, an object is in rotational equilibrium if it has no angular acceleration. Like if a plank of wood is rotating in space, it will be in equilibrium as long as nothing changes it's angular velocity.

 

[411309]

Translational equilibrium is when the center of mass can still be moving but the system has no overall net acceleration; rotational is when the center of mass is in a fixed position and theres no net force in the clockwise or counter direction.

 

[TinaBina22]

Translational equilibrium I thought occurs when the forces on an object is zero and the object either doesn't move or moves at constant velocity

Rotational equilibrium occurs when sum of torques are zero and the object isn't rotating or is rotating at constant angular velocity. Right?

 

[411309]

yes, when the net force is zero

 

[fas376]

Speaking of translational equilibrium - is rotational kinetics on it? ie angular momentum, etc.

 

[railgun]

Speaking of translational equilibrium - is rotational kinetics on it? ie angular momentum, etc.

I do think it can be in translational equilibrium, but may or may not be in rotational equilibrium. (it may be at rest, but accelerating 'rotationally')
So yes, rotational kinetics should still apply