All Questions
Tagged with relative-motion rotational-dynamics
16
questions
0
votes
1
answer
53
views
To find the displacement of a rolling body
When calculating the displacement of a rolling body do we just calculate the displacement due to Vcom in a particular time t or additionally need to consider also the displacement that may be produced ...
0
votes
3
answers
68
views
Time Dilation and Spinning Reference Frames
If a spaceship approaches a rapidly spinning planet, would the planet's inhabitants , the inhabitants of the planet where the spaceship came from , and the spaceship's occupants observe time dilation ...
0
votes
0
answers
105
views
Is there a bug in this step (and how to fix it?)
Reading an old book of classical mechanics (Spiegel's theoretical mechanics) I came across a passage that I would like to clarify. In order to find the equations of motion of free falling point ...
- 1,139
3
votes
2
answers
60
views
Why don't hovercrafts move West relative to the Earth [duplicate]
Suppose that there is a hovercraft floating a few centimetres above the Earth's surface. As it is disconnected from the Earth, which is spinning from West to East, shouldn't it appear to move East to ...
- 363
2
votes
4
answers
3k
views
Why does hot air balloon rotate with the earth?
This might be a silly question but I have been wondering this for quite a while.
When a hot air balloon is flying in the sky, the earth is rotating at the speed of 1000 mph. Why does it move along ...
- 131
2
votes
1
answer
116
views
Why ball fall at same location from where we throw it? [duplicate]
I have a silly question. As we all know earth is rotates at a speed of 460 m per sec. So if I throw a ball in the air for 10 sec than the ball must fall 4600 m away from me but these does not happen ...
- 21
0
votes
1
answer
140
views
Can we move without moving? [duplicate]
So here is the question,
If I jump and hover over the ground for sometime why don't we move away from the point I jumped from? Because earth is rotating so if I hover long enough we should move from ...
- 13
0
votes
1
answer
231
views
How would one compute the path of an particle's motion from forces defined in different frames of reference?
I'm trying to write a computer program to render and play-back the path of a particle existing in 2D space given all forces acting on said particle. This is relatively easy to do if all forces are ...
0
votes
3
answers
2k
views
Explain the relative motion between two particles of a rotating rigid body
A rigid body is defined as a collection of particles in which distance between each pair of particles remains constant.
I was taught that the motion of any one particle of the rigid body with respect ...
- 103
1
vote
2
answers
147
views
Relativity of velocity while riding a bike
I was trying to think of a situation in which an observer would be able to determine whether he is moving or not. Since velocity is a relative quantity I was unable to do so.
However, consider a ...
- 444
1
vote
2
answers
2k
views
Directions of static & kinetic friction?
Static friction :
Static friction opposes relative motion between two surfaces. The car is moving at some tangential velocity relative to the road. Thus, static friction should act in the opposite ...
- 27
4
votes
1
answer
2k
views
Angular momentum about a moving point
I was used to see the Angular Momentum Principle as:
$\dot{\underline{H}_O} = \underline{M}_O^{ext}$
that is, the change in angular momentum equates the external torque w.r.t. a point $O$.
Now, I'...
- 143
1
vote
1
answer
120
views
Centrifugal force in inertial systems
My textbook gives an example:
There are two systems, $O$ is inertial and $O'$ non inertial. $O'$ is rotating whit $\omega=\mathrm{constant}$ and $O=O'$.
We assume that a disc is rotating whit the ...
- 165
-1
votes
2
answers
58
views
Velocity as viewed from space
I got a problem which asks if the speed of a car in Oslo is 50km/hr what will be its speed when viewed from space.
I have the relation between the velocities as observed from inertial and non-...
0
votes
0
answers
830
views
Simple Rotating frame of reference
I have a car moving in straight line with certain time-varying acceleration and there is another car moving in a curvilinear way along some curved path with some time-varying acceleration. The ...
- 135