Can a car be considered in rotational equilibrium?

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Homework Help Overview

The discussion revolves around the concept of rotational equilibrium, particularly in relation to a car moving in a circular path. Participants explore whether a car can be considered in rotational equilibrium and how torque applies in this context.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the definition of rotational equilibrium and its application to objects not physically connected to an axis of rotation. Questions arise about the net torque on a car moving in a circular path and the conditions under which rotational equilibrium can be applied.

Discussion Status

The discussion is active, with participants offering insights into the nature of torque and rotational equilibrium. Some guidance has been provided regarding the conditions under which these concepts can be applied to a car, though multiple interpretations and assumptions are still being explored.

Contextual Notes

There is an ongoing examination of the definitions of static and rotational equilibrium, as well as the implications of a car's motion on these concepts. Participants are questioning the assumptions related to the application of torque in non-static scenarios.

shortydeb
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The impression I'm getting of rotational equilibrium is that it applies to objects that are connected to an axis of rotation, such as a ball connected to a rod. What if a car was moving in a circular path, would the concept of torque apply to it, even though it's not connected physically to its axis of rotation?

thank you!
 
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Hi shortydeb,

Rotational equilibrium exists when the total net torque on an object is zero. Static equilibrium is when the object is also not in motion. You can apply both concepts to a car (depending on the situation of course).

You can definitely calculate the torque on a car. If a car is moving on a circular track at constant speed, what is the net torque on it?

Did this answer your question?
 
Welcome to PF!

Hi shortydeb! Welcome to PF! :smile:

Rotational equilibrium is often used to calculate forces where there isn't really any sensible axis.

For example, you may have noticed that if you and a friend are carrying a heavy pole, the one who holds it nearer the end supports less weight.

This can only be calculated by using the fact that the pole is not rotating! :smile:
 
I would guess it's zero since the car has no angular acceleration...

anyway i thought about this for a little bit and i concluded (wrongfully or not) that any object can be in rotational equilibrium since the sum of the external torques just has to be equal to zero.

Much appreciated btw.
 

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