Torque Help: Solving a Stepladder Tension Problem | Quick and Easy Guide

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In summary, the conversation discusses a question about finding tension on a crossbar of a step ladder with negligible weight and a person standing on it. The dimensions and surface are given, but more clarification is needed on the geometry and how the person's weight is modeled. The method for finding tension also depends on how the crossbar is mounted and if there is a frictionless connection.
  • #1
thennigar
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first post... see how it goes.

I need some help with a step ladder question. Wont bother giving the question i just need help on how to go about it.

Stepladder of negligible weight, person standing at a point on the ladder. Need to know how to go about finding tension on a crossbar. all the dimensions are givin. And the surface is frictionless.

Thanks
 
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  • #2
You should clarify a bit more the geometrics. How are you modelling the person weight?. Is it a puntual force over the crossbar?. How the stepladder is supported?
 
  • #3
To determine tension on the cross bar you need to know how much it flexes. If the cross bar isn't mounted by bearings to the ladder as is done so often to simplify the study of statics, it's gets really complicated. You'd need to know how the cross bar is mounted, and how much the connection area flexes.
 
  • #4
If the cross bar has a frictionless connection to the ladder there's no tension at all (as there's nothing to provide a tensioning force at the connections). For example, hang a weight on a broom stick with the broom stick resting on two frictionless supports. There's no net tension because the broom stick simply flexes, creating internal tensions and compressions.
 

FAQ: Torque Help: Solving a Stepladder Tension Problem | Quick and Easy Guide

What is torque?

Torque is defined as the measure of a force's tendency to cause rotation around an axis. It is typically measured in units of Newton-meters (Nm) or foot-pounds (ft-lb).

What factors affect torque?

The two main factors that affect torque are the magnitude of the force applied and the distance between the force and the axis of rotation. The longer the distance from the axis of rotation, the greater the torque will be for a given force.

How is torque calculated?

Torque is calculated by multiplying the force applied by the distance from the axis of rotation. The formula for torque is: torque = force x distance.

What are some real-world examples of torque?

Some examples of torque in everyday life include opening a door, using a wrench to tighten a bolt, and riding a bicycle. In these situations, a force is applied at a distance from the axis of rotation, resulting in a rotational motion.

How is torque different from force?

While both torque and force involve the application of a physical force, torque specifically measures the tendency of that force to cause rotation. Force, on the other hand, is a more general term that describes the push or pull of an object.

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