Solve Problem 13: Magnitude of Reaction Force at Pivot

  • Thread starter Pakbabydoll
  • Start date
In summary, the conversation discusses finding the magnitude of the reaction force at the pivot for a given problem in which the magnitude of the angular speed, angular acceleration, and acceleration of the center of mass are known. The individual attempted solutions involve using the formula F=ma and taking the square root of a given equation to find the answer. However, there is uncertainty about the accuracy of the solution and the correct method for obtaining it.
  • #1
Pakbabydoll
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0

Homework Statement


n my homework we are asked to find the magnitude of the reaction force at the pivot at a instant and earlier in the problem we found the magnitude of the angular speed at one instant, the magnitude of the angular acceleration at the same instant, and the magnitude of the acceleration of its center of mass at the same instant

PROBLEM # 13

Homework Equations


I am lost now... am attaching the picture

The Attempt at a Solution


F= (4.5)(16.43509961) (my numbers)
but the answer is wrong..

than I tried
F= ma
F= (4.5)(7.350000002) (transitional acceleration only)
answer is still wrong :(

my numbers =

angular acceleration= 2.133526851
angular velocity= 2.065684802
Net acceleration= 16.43509961

mass- 4.5
rod- 6.89

What am I doing wrong?
 

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  • #2
HEEEEEELPPPPPPPPPPPPPPPPPP please!
 
  • #3
so so for future users this is how you get the answer:

(1/2)(9.8)(m)^2+(1/4)(9.8)(m)^2
than take square root of that


but I still don't know why you get it that way... its too late for me to plug it into the system so I am not sure if its even right but that's how you get it...
 
  • #4
Pakbabydoll said:

The Attempt at a Solution


F= (4.5)(16.43509961) (my numbers)
but the answer is wrong..
:confused:

than I tried
F= ma
F= (4.5)(7.350000002) (transitional acceleration only)
answer is still wrong :(
On the right track here. Note that F is the net force. You need to find the force of the pivot on the rod.
 

FAQ: Solve Problem 13: Magnitude of Reaction Force at Pivot

What is the purpose of solving Problem 13: Magnitude of Reaction Force at Pivot?

The purpose of solving this problem is to determine the magnitude of the reaction force at the pivot point in a given system. This force is important in understanding the stability and equilibrium of the system, as well as in predicting the motion of objects within the system.

What information is needed to solve Problem 13: Magnitude of Reaction Force at Pivot?

To solve this problem, you will need to know the external forces acting on the system, the geometry and mass of the objects within the system, and the location of the pivot point. It may also be helpful to have a diagram or visualization of the system to better understand the forces and their directions.

What are some common methods used to solve Problem 13: Magnitude of Reaction Force at Pivot?

There are several methods that can be used to solve this problem, including the equations of static equilibrium, free body diagrams, and vector analysis. The specific method used will depend on the complexity of the system and the information given in the problem.

How can I check my answer for Problem 13: Magnitude of Reaction Force at Pivot?

One way to check your answer is to use the equations of static equilibrium to ensure that the sum of all forces and moments in the system is equal to zero. You can also compare your answer to the expected range of values for the reaction force based on the given external forces and geometry of the system.

Can Problem 13: Magnitude of Reaction Force at Pivot be applied to real-world situations?

Yes, this problem can be applied to real-world situations such as analyzing the stability of structures, predicting the motion of objects in mechanical systems, and determining the forces acting on objects in a moving system. It is a fundamental concept in physics and engineering that has many practical applications.

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