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Posts tagged forces

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Q&A Structural analysis of a wooden board and dowel

Suppose you have a wooden board lying horizontal, with grain along the long axis as is the case with normal boards. There is a wooden dowel embedded into the board, as is the case with common dowe...

1 answer  ·  posted 10mo ago by matthewsnyder‭  ·  last activity 6mo ago by ArtOfCode‭

Question forces shear
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Q&A Why does tension change from 15 N to 17 N when forces are replaced by weights?

I'm working on a problem involving a pulley system, and I’m confused about how the tension changes when forces are replaced by masses. Initially, if I apply forces of 20 N and 15 N directly at the...

2 answers  ·  posted 7mo ago by Thor ‭  ·  last activity 7mo ago by harmony‭

Question forces
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Q&A How to find position of a particle at a time given a position dependent force

If we have a force which changes depending on the position of a particle, how can we find the position of the particle at some time $t$? We can find its velocity if it has travelled a given distan...

1 answer  ·  posted 3y ago by MissMulan‭  ·  edited 2y ago by Trilarion‭

Question time newtonian-mechanics forces
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Q&A What is virtual work?

$$\sum_i F_i \cdot \delta r_i$$ is virtual work when internal force is $0$. For that reason, $$\sum_i F_i \cdot \delta r_i = 0$$ Here internal force stands for what? When a object's displacement ...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

Question classical-mechanics forces virtual-work
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Problems Why used $\cos\theta$ for $\text{y}$ axis or, gravitational force?

Mass M1 is held on a plane with inclination angle θ, and mass M2 hangs over the side. The two masses are connected by a massless string which runs over a massless pulley (see Fig. 3.1). The c...

1 answer  ·  posted 3y ago by deleted user  ·  last activity 3y ago by deleted user

Question classical-mechanics forces