What is the torque exerted by T about point O?

  • Thread starter Auburn2017
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In summary: So what torque does T exert about O?It doesn't really matter what torque T exerts, as long as it's greater than the torque due to the weight of the object. The weight of the object is pulling down on the object, which is trying to keep it in the same place. So the object will move in the direction of the greater torque.It doesn't really matter what torque T exerts, as long as it's greater than the torque due to the weight of the object.
  • #1
Auburn2017
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Homework Statement


The problem is shown in the image attached.

Homework Equations


∑F = -235i -Fi +Tcos25i + Tsin25j +210cos25i +210sin25j
Moment = r x F[/B]

The Attempt at a Solution


I have tried various things. I tried summing all the moments and then setting that equal to zero to find T. I have tried just adding the forces and setting equal to zero to find T. None of these approaches have helped so far. Right now I am just interested at find T. Could someone just point me in the right direction to start. Thanks much.
 

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  • #2
Auburn2017 said:
I have tried various things. I tried summing all the moments and then setting that equal to zero to find T.

That approach will find T. Show your work and we'll see what went wrong.
 
  • #3
Chose the positive for finding moment. You must use ΣM=0.
Note M=||rxF||=r.F.sina
 
  • #4
billy_joule said:
That approach will find T. Show your work and we'll see what went wrong.

This is what I get. I also know if the distance between the force and the point is perpendicular then the moment just equals rF. If you do this then you can get the right answer but I do not understand the sign on the four terms...
 

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  • #5
Auburn2017 said:
This is what I get. I also know if the distance between the force and the point is perpendicular then the moment just equals rF. If you do this then you can get the right answer but I do not understand the sign on the four terms...
Let's just consider the moment due to T to begin with. The moment is the force times the perpendicular distance between the axis and the line of action of the force, right? What is that perpendicular distance?
 
  • #6
haruspex said:
Let's just consider the moment due to T to begin with. The moment is the force times the perpendicular distance between the axis and the line of action of the force, right? What is that perpendicular distance?
Easy.. 0.1m
 
  • #7
Auburn2017 said:
Easy.. 0.1m
So what torque does T exert about O?
 

FAQ: What is the torque exerted by T about point O?

What is tension force?

Tension force is a type of force that is exerted when an object is pulled or stretched. It is a result of the internal forces within an object or system, and acts in the opposite direction to the applied force.

How is tension force different from resultant force?

Tension force is a specific type of force that is exerted internally within an object or system, while resultant force is the combined effect of all forces acting on an object. Tension force is only one component of the overall resultant force.

How do you calculate resultant force?

To calculate resultant force, you need to first identify all the forces acting on an object or system. Then, use the principles of vector addition to find the sum of all the forces. This sum represents the resultant force acting on the object.

Can tension force and resultant force be in the same direction?

Yes, tension force and resultant force can be in the same direction. This can occur when all the forces acting on an object are pulling or pushing in the same direction, resulting in a larger resultant force in that direction.

How does tension affect the stability of an object?

Tension force can affect the stability of an object by either increasing or decreasing its stability. When tension force is applied in a direction that is opposite to the direction of gravity, it can increase the stability of an object. However, if the tension force is applied in the same direction as gravity, it can decrease the stability of an object and cause it to topple over.

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