How does the force get cancel out?

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In summary, the principle of equilibrium states that when the net force acting on an object is zero, the object will remain at rest or continue to move at a constant velocity. This can be determined by calculating the sum of all the forces acting on the object and seeing if it equals zero. However, forces in equilibrium can still cause motion if there is an external force acting on the object, which can be important in everyday life for understanding the motion of objects and designing structures.
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cmkc109
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Homework Statement



How does the force get cancel out?

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The Attempt at a Solution



Please see the picture.
I don't understand why is F1 not included in the system ?
F1 just looks the same as F4, but F4 is included in the calculation.
Someone told me the horizontal vector and vertical vector somehow cancel out each other but i don't quite get it..
 

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  • #2
What exactly does the calculation involve?
 
  • #3
solved the problem!
 

1. How does the force get cancel out?

When two forces are acting on an object in opposite directions and have equal magnitudes, they will cancel each other out. This is known as the principle of equilibrium.

2. What is the principle of equilibrium?

The principle of equilibrium states that when the net force acting on an object is zero, the object will remain at rest or continue to move at a constant velocity.

3. How do we determine if forces are in equilibrium?

If the net force acting on an object is zero, then the forces are in equilibrium. This can be determined by calculating the sum of all the forces acting on the object and seeing if it equals zero.

4. Can forces in equilibrium still cause motion?

Yes, forces in equilibrium can still cause motion if there is an external force acting on the object. In this case, the object will accelerate in the direction of the net force.

5. How is the concept of equilibrium important in everyday life?

The concept of equilibrium is important in everyday life because it helps us understand how objects stay at rest or move at a constant velocity. It also allows us to predict the motion of objects and design structures that can withstand external forces.

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