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Physics

Questions tagged [statics]

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Analysis of a system of bodies where all forces are in balance and there is no motion relative to a chosen reference frame.

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11votes
2answers
3kviews

A little while ago, I was fidgeting with a ball and some elastic bands, and I noticed that it seems like the elastic bands have to lie along a great circle (or near one) in order to not snap off.Is ...
0votes
0answers
23views

When I first took courses in dynamics and statics (they were part of an applied mathematics track rather than physics), I didn’t really appreciate them and only studied enough to pass. I also didn’t ...
1vote
0answers
79views

Consider Da Vinci's famous "boltless" bridge. (See image below*) Consider in particular an implementation with a significant 'arc', i.e. both ends start with a significant incline.How to ...
-3votes
2answers
156views

The same string connects massless pulleys 1, 2, 3 (pulleys 2 and 3 are fixed). What is the force F'? If tension is uniform in the string then it seems like it can not be 2F, but then pulley 1 would ...
0votes
1answer
129views

I want to know in this diagram why can't I assume the rope that has angle θ1 is the hypotenuse of a right triangle and since vertical segment has tension 5N and slanted rope has same tension then why ...
0votes
0answers
74views

A little bit of background here: I have a bachelor’s in chemistry and have broad interests in scientific topics but I am NOT a scientist. I can handle a mathematical explanation but not a specialist ...
7votes
1answer
2kviews

Lately I observed that the bars that is used to do bench press in gym don't immediately fall on the side loaded with weight. Which does not sound correct intuitively, the bar should fall down because ...
21votes
2answers
5kviews

There are two people lifting a table of length $l$. One is short the other one is tall. The table is solid so its center of mass is therefore at the center of the table. Since the two people are of ...
1vote
1answer
111views

I'm studying buoyancy and am curious about how much control one has over a floating object's orientation and the fraction of its volume that lies below a fixed horizontal plane (the "waterline&...
1vote
1answer
151views

A table has a heavy circular top of radius $1$ meter and mass $20\text{ kg}$. It has four light legs of length $1$ meter fixed symmetrically on its surface. What is the maximum mass that may be placed ...
0votes
0answers
75views

I am working on subcritical water systems. I have a 7mL stainless steel (rated to 12k psi) tube that I fill with Deionized water (no head room. I screw this filled tube onto a system and pump the ...
0votes
3answers
140views

My question is that when we apply a force equal to $F$ to an object and $F$ is greater than $F_{s,\text{max}}$, then it is clear that the object moves. But with what acceleration? It moves with an ...
0votes
1answer
140views

Consider a case where a theoretically crafted truss problem has more variables than number of equations, for example by simply adding a straight rod between any two points of a truss system that was ...
5votes
1answer
615views

The capstan equation tells us that if a rope winds around a cylinder through an angle of $\theta$ with a coefficient of static friction $\mu$, friction can hold the rope in place as long as the ...
2votes
0answers
93views

I'm trying to solve a practical problem with what feels like should be basic physics. I've guessed that this problem might be about vectors, pulleys and trigonometry, but it's knowledge which I lack, ...

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