Equilibrim Physics Problems – Solve Now!

  • Thread starter gnarrr
  • Start date
In summary, the problem asks for the distance from point 'A' where a downward force of 40.5 N must be applied to achieve rotational equilibrium. The relevant equations are T1=T2 and F=0. The attempt at a solution used the equation 5x9.8x2.1 + 3.5x9.8x4.3 + 40.5xd = 0, but the first attempt was incorrect. The correct solution involves considering both clockwise and counterclockwise moments and equating them to solve for d.
  • #1
gnarrr
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  • #2
Hi gnarrr, welcome to PF.
Please go through the rules of the PF.
Don't post the problems alone. Show your attempts. List the relevant equations. Still if you don't get, we will help you.
 
  • #3
The first one

Homework Statement



Consider the bar to have negligible mass. How far from point 'A' must a downward force of 40.5 N be applied in order to achieve rotational equilibrium.

Homework Equations


T1=T2
F=0

The Attempt at a Solution



5x9.8x2.1 + 3.5x9.8x4.3 + 40.5xd = 0
d=6.18m
 
  • #4
i figured out the second one
 
  • #5
First on is wrong.
If you want to take the moment about the fulcrum, you have to consider clockwise and counterclockwise moments and use proper sings.
If you want to take the moments about A, 40.5 N and 3.5 kg produce clockwise moment and the reaction due to all the forces on the fulcrum will produce the counterclockwise moment. Equate them to get d.
 

1. What is Equilibrium Physics?

Equilibrium Physics is the branch of physics that deals with the study of objects at rest or in constant motion. It involves understanding the forces acting on an object and how they balance out to keep the object in a state of equilibrium.

2. What are some common types of Equilibrium Physics problems?

Some common types of Equilibrium Physics problems include calculating the magnitude and direction of forces acting on an object, determining the center of mass, and analyzing the stability of an object.

3. How do I solve Equilibrium Physics problems?

To solve Equilibrium Physics problems, you will need to identify all the forces acting on the object and use Newton's laws of motion to determine the net force and acceleration of the object. Then, you can use the equations for equilibrium to solve for any unknown variables.

4. What are the key principles of Equilibrium Physics?

The key principles of Equilibrium Physics include the first and second laws of motion, which state that an object at rest or in constant motion will remain in that state unless acted upon by an external force, and that the net force on an object is equal to its mass times its acceleration.

5. Why is understanding Equilibrium Physics important?

Understanding Equilibrium Physics is important because it helps us explain and predict the behavior of objects in our everyday lives, from buildings and bridges to simple machines. It also forms the basis for many other areas of physics, such as mechanics, fluid dynamics, and thermodynamics.

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