All Questions
Tagged with inertia classical-mechanics
35
questions
2
votes
2
answers
706
views
Using the principle of inertia to motivate the principle of least action?
Can we motivate the principle of least action with the principle of inertia that causes a mass particle to resist changes in its momentum? After all, the principle of inertia is the starting point and ...
- 735
1
vote
1
answer
72
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How density of fluids is would affect inertia?
I was watching that movie Event Horizon and they use water as an instrument to protect passengers of a space vessel from 30G acceleration, so my question is about a similar scenario, what would happen ...
- 11
-1
votes
4
answers
220
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How can you figure out when inertia or momentum is keeping the object in motion?
If we consider the case of Earth, inertia carries the Earth forward (inertia alone will make the Earth go out of orbit so gravity keeps it in orbit around the sun), but if we consider the case of a ...
- 419
0
votes
7
answers
848
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Why does "net force" being zero not mean that the parachuter becomes stationary in the atmosphere?
Take the typical phyiscs / classical mechanics example of a parachuter descending at constant speed. The two forces acting on the parachuter are weight, which has direction towards the ground, and air ...
- 899
-3
votes
1
answer
45
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Decrease of the rotation speed of a wheel with inertia, when we stop applying rotational force to it [closed]
Let's say we have a wheel rotating at a constant speed $s$.
Suddenly at time $t=1$ we stop applying force to it.
What is the law for the decrease of the speed, until it stops?
I guess it will look ...
- 183
1
vote
2
answers
48
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An object on top of a rotating mass like earth
Why do objects fall down in same place on the rotating earth? I get that newton's first law is the reason an object falling on a high speed train will maintain the same velocity as a train and ...
- 71
0
votes
3
answers
93
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Moment of inertia of a solid sphere; spot the mistake [closed]
What an I doing wrong?:
$I = \int r^2dm$
$M = \rho \frac{4}{3} \pi r³$
$dM = \rho \frac{4}{3} \pi 3r²dr = \rho 4 \pi r²dr$
$I = \rho 4π \int r^4dr = \rho 4π \frac{r^5}{5} = \frac{3Mr^2}{5} = \frac{3}{...
- 78
1
vote
1
answer
626
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Integral Issue for Inertia of Disk
I am currently following Taylor's "Classical Mechanics" and I am trying to understand creating the correct integrals to solve some problems related to the inertia of various shapes. I am to ...
- 17
0
votes
2
answers
308
views
Physics of pushing the top of a box a little bit to make it rock back and forth
Context:
I'm trying to make a simulation of a box that you can apply force to the top and it will oscillate back and forth until the energy in the system reaches equilibrium again.
Visual ...
- 111
1
vote
0
answers
47
views
Equivalence among three kinds of mass
If there are three kinds of mass
(1) resistance (classical inertial mass, rest mass)
(2) sensitivity to gravity (weight)
(3) creation of gravity,
the Eotvos experiment shows the proportionality ...
user281839
20
votes
6
answers
8k
views
Flying a drone in a moving car/airplane
Why does a drone fly with respect to the air in a moving car/airplane, but not in an elevator as shown in this clip: What Happens If You Fly a Drone In An Elevator?
I understand that the drone will ...
- 415
0
votes
1
answer
736
views
Does the Higgs field explain inertia?
As far as I understand it the Higgs field leads to the creation of rest mass for certain elementary particles but does it explain the phenomenon of resistance to acceleration associated with rest mass?...
- 5,925
10
votes
4
answers
1k
views
Does general relativity explain inertia?
As far as I understand it general relativity does not explain the origin of the inertial mass $m_i$ in Newton's law of motion $\vec{F}=m_i\ d\vec{v}/dt$ but rather it simply applies the concept to ...
- 5,925
0
votes
1
answer
105
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Working principle of an accelerometer
I'm trying to confirm my concepts regarding inertia and accelerometers. Need to verify / correct my thoughts, which are as follows:
Inertia is the property of matter to resist a change in its state ...
- 1,250
0
votes
1
answer
33
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An expanding, sliding charged tube's self-imposed electromagnetic induction
If I have a simple cylindrical electrically-insulating tube possessing a net electrostatic charge and allow the tube to slide parallel to the tube's axis, that tube will possess electric currents ...
- 129