All Questions
Tagged with inertia angular-momentum
18
questions
1
vote
0
answers
24
views
Evolution of a rotating system in which mass continually leaks [closed]
this might be a trivial problem but me and a friend have failed to solve it. This is not homework, it actually relates to a book of mine but that is of no interest. Imagine the following;
Two masses $...
- 308
0
votes
2
answers
380
views
Forces on us on a rotating Earth
So the earth is constantly rotating but it doesn't need a force to rotate. It'll rotate indefinitely.(?) But we and other masses on earth need a force on us to continue rotating along with earth? And ...
- 71
0
votes
2
answers
937
views
What forces act on a car during cornering? (Forward inertia and centripetal force?)
I was testing the physics of an old car racing game on a completely flat, circular course. The game does not simulate downforce or lift, so we can imagine the test was conducted inside a vacuum:
...
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
29
votes
4
answers
8k
views
What causes a rotating object to rotate forever without external force—inertia, or something else?
Someone told me that it is not inertia, but I think it is inertia, because it will rotate forever. In my understanding, inertia is the constant motion of an object without external force. Am I wrong?
- 2,040
1
vote
3
answers
2k
views
Does the Earth keep spinning because of inertia?
I understand that the earth continues to rotate about its axis because the angular momentum is conserved. (Am i wrong?!) But, I have seen quite a few sources cite that inertia is the reason why the ...
- 317
-1
votes
1
answer
431
views
torque and infinite moment of inertia
As a continuation of the previous question here:
torque in zero gravity
Say we have two coaxial drums with known moments of inertia $J_1$ and $J_2$. If the first drum contains a motor, which acts on ...
- 111
2
votes
4
answers
6k
views
Which factors can help a car flip on a turn?
I am not sure if this is the right place to ask it, but this is a question that I thought today, and it gave me some curiosity to understand. Imagine that a car will curve, we can say the turn is a ...
- 365
1
vote
1
answer
105
views
What is the minimal G-force curve in 2-dimensional space?
Given two parallel roads, which need to be connected, what shape of curve would produce the minimum overall horizontal G-force(s) on travelers?
Is it a $sin$ or $cos$ wave?
Is it a basic cubic ...
- 448
14
votes
3
answers
4k
views
Could an asteroid land slowly on Earth's surface?
The concept in my mind is that an asteroid is on a vector similar to Earth's, but slightly slower (e.g., 50kmh slower). As Earth passes it, it enters the atmosphere at a sharp angle, and since Earth ...
- 421
2
votes
1
answer
241
views
Why is the Earth self-rotating? [duplicate]
What drives this happen? Would it be the internal energy or by an external force? I did try to Google the answer, but could not find a good one.
- 621
0
votes
2
answers
753
views
Angular velocity of disc from induced motion
I came across a question regarding linear momentum $L$ and it's conservation, however I tried and got confused. It reads: A $40kg$ girl stands on the very edge of a rotating disc of mass $50kg$ and ...
- 109
9
votes
2
answers
8k
views
How does electron spin change instantaneously without violating inertia principle?
The inertia in one of the main properties of matter. That is why all process in macro world do not happen instantaneously.
What I do not understand is how we should apply this general idea of inertia ...
- 563
3
votes
1
answer
3k
views
Does the unit of Inertia include radians? [duplicate]
The unit for angular acceleration $\alpha$ is:
$$\mathrm{rad/s^2}$$
The unit for torque is $\mathrm{Nm}$:
$$\mathrm{kg\ m^2/s^2}$$
And their relationship with Inertia is:
$$I = \tau/\alpha$$
So ...
- 165
2
votes
2
answers
1k
views
Does trade affect Earth's rotation? [duplicate]
Every country is trading with other countries around the world, some more than others. I was wondering if there would be any change to the Earth's rotation because of the imbalance of trade between ...
- 39