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Results tagged with newtonian-mechanics
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user 240866
Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].
1
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How much time does it take friction to start acting?
Since friction occurs due to the irregularities on the surface of materials where between two bodies when these irregularities "bumps" meet, charged particles get very close to each other and exert el …
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2
votes
1
answer
102
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Chameleon's tongue as a harmonic oscillator
I was watching a documentary about reptiles, at some point, it showed how chameleons catch their prey.
Approximately, their tongue has an acceleration of $2500 \frac{m}{s^2}$, length of $0.7m$. They c …
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8
votes
0
answers
341
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Euler-Lagrange equations for chain fountain
Most of us are familiar with chain fountains.
I was wondering how this phenomenon is explained in the Lagrangian mechanics. I mean do we know how the Euler-Lagrange equations look like for this system …
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1
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Confirmation on Potential energy of an object
If an object was propelled from the ground to a certain height h, it's potential energy at that height (h) is said to be mgh. Since the final K.E and initial K.E is 0, total work done is also 0
If y …
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0
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Where does this formula come from?
$$\dot{\vec{r}} = \dot{r}\hat{e_r}+{r}\dot{\phi}\hat{e_{\phi}}$$
$$\ddot{\vec{r}} = (\ddot{r}-r\dot{\phi}^2)\hat{e_r}+({2r}\dot{\phi}+r\ddot{\phi})\hat{e_{\phi}}$$
$$m\ddot{\vec{r}} = m(\ddot{r}-r\dot …
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9
votes
Where does the law of conservation of momentum apply?
Momentum of the body will be transferred to earth, let's exaggerate the numbers in your favor and assume your snowball is $10kg$ and you managed to throw it with $v_s = 200\frac{m}{s}$ where subscript …
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1
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Meeting point of magnets
As you probably know, there's no magnetic monopoles thus it would be difficult to compare the magnitude of the force between two magnets unlike in the case of two electrically charged particles where …
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121
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5
answers
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Toilet paper dilemma
There are two ways to orient the toilet paper: "over" (left image), "under" (right image).
Each has it's pros and cons. For some reason, it's always easier to tear off the paper in the "over" orienta …
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