Forces in Equilibirum? Star Wars forces?

In summary, the problem involves three charges hanging and the solution uses the fact that the forces between the middle and left or right are the same, and sets the sum of the force exerted by the middle charge on the left and right on left to equal the horizontal force. This may seem like Star Wars forces, but it is simply the result of the charges interacting with each other, as explained in section 1.1.3 and Equation 1.3. The presence of a middle charge does not affect the forces between the other two charges. The same principle applies to masses in gravitational forces.
  • #1
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Forces in Equilibirum? Star Wars forces?

Homework Statement



http://iweb.tntech.edu/murdock/books/v4chap1.pdf

Go to question 11 where you see three charges hanging.

The solution is something i don't understand.

The forces between the middle and left or right are the same. But the solution also set sum of the force exerted by the middle charge on the left and right on left together to equal to the horizontal force (I think they made a trig mistake, but it worked out fine in this case since [tex]\theta[/tex] = 45 degrees).

My question is, how does the right exert a force all the way to the left? This is like Star Wars Forces...

How does it even interact with it?
 
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  • #2


flyingpig said:
My question is, how does the right exert a force all the way to the left? This is like Star Wars Forces...

How does it even interact with it?
They both have a charge, therefore they exert a force on each other. See section 1.1.3 and Equation 1.3.
 
  • #3


Redbelly98 said:
They both have a charge, therefore they exert a force on each other. See section 1.1.3 and Equation 1.3.

But there is a middle charge that's "blocking"
 
  • #4


No, charge in the middle doesn't block anything. Whenever you have two charges they either attract or repel each other, no matter what other charges are present around. Thus to solve any question you have to take care of forces between each pair of charges.

Same happens when you have a set of masses (stars, planets) and gravitational forces.
 

1. What is the definition of "forces in equilibrium"?

Forces in equilibrium refer to a state in which all forces acting on an object are balanced, resulting in no net force and thus no acceleration. This means that the object will either remain at rest or continue moving at a constant velocity.

2. How do you calculate the net force in a system of forces in equilibrium?

To calculate the net force in a system of forces in equilibrium, you must first determine the magnitude and direction of each individual force. Then, you can add all of the forces together using vector addition. If the resulting sum is zero, the forces are in equilibrium.

3. What are some real-life examples of forces in equilibrium?

Some examples of forces in equilibrium include a book sitting on a table, a car parked on a flat road, and a person standing still. In each of these situations, the forces acting on the object are balanced, resulting in no net force and no movement.

4. How does the concept of forces in equilibrium apply to Star Wars?

In the Star Wars universe, there are numerous examples of forces in equilibrium. For instance, when a spaceship is in space and not accelerating, the forces acting on it are balanced, resulting in equilibrium. Additionally, during a lightsaber duel, the opposing forces of the two lightsabers are in equilibrium until one fighter gains an advantage.

5. How can forces in equilibrium be disrupted?

Forces in equilibrium can be disrupted by the introduction of an unbalanced force. This could be caused by a change in the magnitude or direction of one of the forces, or by the addition of a completely new force. When this happens, the object will experience acceleration in the direction of the unbalanced force.

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