All Questions
Tagged with relative-motion reference-frames
10
questions with no upvoted or accepted answers
3
votes
0
answers
209
views
Scalar versus invariant in Newtonian mechanics
I looking up coriolis transport theorem for rotating refrence frames and while reading through this derivation he wrote:
In Newtonian mechanics, scalar quantities must be invariant for any
given ...
- 201
1
vote
1
answer
75
views
Principle of Relativity and the invariance of Newton's law in IRFs
Newton's law are form invariant under the coordinate substitutions:
$$
\tilde{x^{i}}=x^{i}+a^{i}
$$
This means that Newtons' equation of motion,
$$
F^{i}=m \frac{d^{2} x^{i}}{d t^{2}}
$$
(where $i=1,2,...
- 11
1
vote
0
answers
114
views
Work done on a moving cart in wind
Let us suppose a cart is moving in a rough ground with a propeller attached to the roof of the cart.
Let the velocity of the cart at the given point of analysis be V and velocity of wind is -W. The ...
1
vote
1
answer
230
views
Kinematics in moving reference frames
Assume we have an object moving along a path $p_W(t)$ that is described in some fixed reference frame $W$. If we now have a second reference frame $B$ which differs from $W$ by some time varying ...
1
vote
0
answers
118
views
Are there local coordinates for Schwarzchild spacetime?
In the Schwarzchild metric, $t$ is the time on the clock of an observer at infinity, and $r$ is the related to the area of a sphere by $A=4\pi r^2$. Are there more physical coordinates one could use, ...
- 1,647
0
votes
1
answer
23
views
The difference of work (i.e. increase of KE) to change speed in different (Galilean) reference frames from the point of view of the energy source?
I fully accept that kinetic energy is not invariant between Galilean frames of reference, velocity is. So the same change in velocity requires different work (i.e. change in kinetic energy) done in ...
- 1
0
votes
2
answers
71
views
Meaning of the term speed of light in context of an object of non-zero mass
We know from GR that an object of non-zero mass cannot propagate at light. I have a problem with the term speed of light. Does it mean the relative speed of that object with another object or frame of ...
- 37
0
votes
0
answers
831
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
0
votes
0
answers
118
views
Is it possible to derive the Doppler effect formulas for sound using relative velocity?
Is it possible to derive the Doppler effect formulas for sound using relative velocity? If possible can anyone please explain it to me.
- 135
-1
votes
2
answers
58
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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-...
