All Questions
Tagged with free-body-diagram statics
114
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Statics problem from classical mechanics
I was solving David Morin's book on classical mechanics.
In the solution for the second part of the "a" part of the question, why is the normal force defined as $Ndθ$ and not just $N$? Is ...
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Why isn't the moment always included in a free-body diagram?
Now I have seen many times both in my physics book and other books when drawing a free body diagram the moment is not included but the forces are. For example in 2d when a beam is fixed to a wall ...
- 103
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How does this tensegrity table work?
I have assembled below a desk toy which seems to defy laws of physics at first glance (objects can be placed on top of it up to a certain limit, since it is already under strain).
The toy is in fact ...
- 1,410
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Does the law of the lever apply to all levers?
I recently posted a question involving the law of the lever, and I realized I was unclear on what it meant. I understand that, for a lever to be balanced, the effort force times the effort arm must be ...
- 539
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What is the amount of force applied on my back while I'm brushing teeth leaning forward?
This is a question I've had for several years but never had the knowledge to calculate myself. Please keep in mind I don't have much background in physics (learned some on middle school I guess...), ...
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How can the force acting at the fulcrum of a lever be calculated?
I know how to calculate the force applied to either or both ends of a lever system, but I would like to know how to calculate the force applied over the fulcrum of a lever.
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Tensions in the chains [duplicate]
What is the physics behind this mechanism? What would be the free body diagram be like regarding all the magnitudes of the tension forces present in the chains?
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2
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111
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Tensions in the chains
What is the physics behind this mechanism? What would be the free body diagram be like regarding all the magnitudes of the tension forces present in the chains?
- 23
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2
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Why can multiple eggs support more weight per egg when there are more of them?
In this video by TAMU Physics & Astronomy titled "Eggs can support A LOT of weight!": https://www.youtube.com/shorts/a7JvE-fGrgg?feature=share
The teacher first grabs an egg and places ...
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Is the weight of something being dropped the same as the force of something being static?
If I have a block of let's say: 10 kg and I put it over my foot in a static manner, what we know from static mechanics is that my foot is opposing the weight of the 10 kg mass with the same force in ...
- 165
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Origination of internal forces in a beam under axial loads
Take a prismatic beam and subject it to a tensile loading, assume we are applying a load of 10 N on both of its ends. As we know, the beam stretches by a certain amount on either sides.
And since ...
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How to calculate longitudinal force on two rods where each is fixed at one end to the ground and connected to each other at the other? [closed]
Imagine a 2D scenario.
There are 2 rods.
Both are fixed at one end to the ground (some distance away from each other). The connections to the ground are universal joints that are free to rotate.
The ...
- 111
1
vote
2
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Weight distribution and support polygon
I was working on a problem of supporting an object with sticks and wondering about some use cases that would fail.
My approach is to place the n-sticks (for example 4) under an object with mass m ...
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Is it possible to find the forces in this problem involving a block/beam/bar glued to the side of a wall?
This is a follow-up to a previous post of mine post. In that post, we concluded that a beam cannot be held in place by an application of normal forces in only one location if that location is off the ...
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Horizontal bar with one fixed end held by support beams touching/"pinching" it at one location to keep it from falling — Unsolvable problem?
Suppose we have a horizontal rigid bar held in place by two reinforcement beams (one above the bar and one below the bar), both of which are attached to a wall, such that they "clamp" the ...
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