Beam and Support Force Question

In summary: You may need to use the fact that the total mass of the beam and student is 105.9 + 64.8 = 170.7kg to help you solve the equations.
  • #1
G.T
3
0

Homework Statement


A 7.20m long rigid beam with a mass of 105.9kg is supported at each end. A 64.8kg student stands 1.33m from support 1. How much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.)
Incorrect. Tries 9/10 Previous Tries https://loncapa.physics.mcmaster.ca/enc/52/7bfddd85ead53c8f14583bfd85d890dbb8c568726a65d4d6649059f2d0ac61a9b89dce375e2817b5025710e5afbd449840c9f4eb4d76711b0370f0e564254ec091780c11a4a72cd5.png

Homework Equations



Moment of Inertia

The Attempt at a Solution


I keep getting 826 for t1 and 847 for t2[/B]
 
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  • #2
G.T said:

Homework Statement


A 7.20m long rigid beam with a mass of 105.9kg is supported at each end. A 64.8kg student stands 1.33m from support 1. How much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.)
Incorrect. Tries 9/10 Previous Tries https://loncapa.physics.mcmaster.ca/enc/52/7bfddd85ead53c8f14583bfd85d890dbb8c568726a65d4d6649059f2d0ac61a9b89dce375e2817b5025710e5afbd449840c9f4eb4d76711b0370f0e564254ec091780c11a4a72cd5.png

Homework Equations



Moment of Inertia

The Attempt at a Solution


I keep getting 826 for t1 and 847 for t2[/B]

"Moment of inertia", whatever that means, is not how you solve this problem.

Try writing the equations of static equilibrium for this beam, and then using them to solve for the unknown reactions.
 

Related to Beam and Support Force Question

1. What is a beam and support force question?

A beam and support force question is a type of problem that involves analyzing the forces acting on a beam or structure that is supported by one or more supports. These questions are commonly found in physics and engineering courses, and require knowledge of mechanics and statics to solve.

2. How do you approach solving a beam and support force question?

The first step in solving a beam and support force question is to draw a free-body diagram of the beam and all the forces acting on it. This includes any external forces, such as weights or applied loads, as well as any internal forces, such as reactions from supports or internal stresses within the beam. Once all the forces are identified and drawn, you can use equations of static equilibrium to solve for the unknown forces.

3. What are the different types of supports in a beam and support force question?

There are three main types of supports in a beam and support force question: fixed supports, roller supports, and pinned supports. Fixed supports prevent translation and rotation of the beam at that point, roller supports only prevent translation, and pinned supports allow for both translation and rotation. These different types of supports will affect the magnitude and direction of the support forces in the problem.

4. Are there any shortcuts or tricks to solving beam and support force questions?

While there is no one-size-fits-all shortcut for solving beam and support force questions, there are a few tips that can make the process easier. One is to always start by drawing a clear and accurate free-body diagram. Another is to carefully label all forces and unknowns, and to use equations of static equilibrium systematically to eliminate unknowns and solve for the remaining forces.

5. How can I check my answer to a beam and support force question?

The best way to check your answer to a beam and support force question is to confirm that your solution satisfies all the equations of static equilibrium. This means that the sum of all forces in the x-direction and the sum of all forces in the y-direction should equal zero, and the sum of all moments around any point should also equal zero. You can also double check your calculations and make sure they are consistent with the given problem conditions and any known properties of the beam or supports.

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