No idea how to start this tension/cable problem

In summary, Matt is having trouble with a problem in static equilibrium and is seeking help. He has attached a scanned picture of the problem and is asking for assistance in determining the net force in any direction. The conversation then moves on to discussing the gravitational force acting on the sign and how it is split up between the two cables holding the sign.
  • #1
tatsalez
7
0
I'm having a really hard time figuring out where to start this problem, let alone finish it. Can anyone help me through it? I attached a scanned picture of the problem.

Thanks,
Matt
 

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  • #2
It's a problem in static equilibrium. What must the net force equal in any direction?

Draw a free body diagram of the sign, indicating all forces acting on it.
 
  • #3
Okay, what's the basic effect that causes all the forces? Gravitation, of course, ha?
Now as a first step find out the gravitational force acting on the sign!
Then you know that the two cables are holding the sign, so they have to hold the whole gravitational force! How do you split up the force? It's not a simple addition...
 

1. What is the purpose of the tension/cable problem?

The tension/cable problem is a common physics problem that involves determining the tension force in a cable or rope that is supporting an object. It is used to demonstrate the principles of static equilibrium and the relationship between tension, weight, and angles.

2. How do I approach solving a tension/cable problem?

The first step in solving a tension/cable problem is to identify all the forces acting on the cable, including the weight of the object it is supporting. Then, use the principles of static equilibrium to set up equations and solve for the unknown tension force.

3. Can I use any specific equations to solve a tension/cable problem?

Yes, there are specific equations that can be used to solve tension/cable problems. These include the equations for static equilibrium, such as sum of forces in the x-direction equals zero and sum of forces in the y-direction equals zero. The Pythagorean theorem can also be used to find the magnitude of the tension force.

4. What are some common mistakes to avoid when solving a tension/cable problem?

One common mistake is forgetting to include all the forces acting on the cable, such as friction or external forces. It is important to carefully analyze the problem and identify all the forces before setting up equations. Another mistake is using the wrong angle for the tension force, so it is important to pay attention to the given information and draw accurate diagrams.

5. Are there any real-world applications for tension/cable problems?

Tension/cable problems have many real-world applications, such as in engineering and construction. They are used to calculate the tension in cables supporting bridges, cranes, and other structures. They are also used in rock climbing and other sports that involve ropes and cables.

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