Solving Moments of Force: Finding A & B

  • Thread starter Thread starter isigne
  • Start date Start date
  • Tags Tags
    Force Moments
AI Thread Summary
To find the forces at points A and B, the correct approach involves balancing the moments around point A. The equation used should include all forces acting on the system, including the neglected 2kN force at the left end. The distance between points A and B is also crucial for accurate calculations. The initial attempt mistakenly omitted these factors, leading to an incorrect result. Properly accounting for all forces and distances will yield the correct values for A and B.
isigne
Messages
2
Reaction score
0
1.

bcb2e14d67b70ed7b51d9eab837ab547.png


How do I find the force of A and B. I am taking moments at A but I am not getting the correct answer. (More Details below of attempt)

Homework Equations



Ʃ Of Clockwise Moments = Ʃ Of Anti-Clockwise Moments
Ʃ Of Upward Force = Ʃ Of Downward Force

The Attempt at a Solution



(THIS IS WRONG BUT THIS IS MY ATTEMPT)

A => (3x2)+(5x5)+(12x2)= Bx11
=> 6 + 25 + 24 = B x 11
=> 55 = B x 11
=> 55/11 = B
=> 5 = bTHANKS FOR HELP, I was trying this weekend and I need some genius advice so when I get this question again, I will be able to do so :)
 
Physics news on Phys.org
isigne said:
A => (3x2)+(5x5)+(12x2)= Bx11
I assume you're using A as your pivot point.
(1) You neglected the moment due to the 2kN force at the left end.
(2) What's the distance between B and A?
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top