All Questions
Tagged with relative-motion newtonian-mechanics
200
questions
5
votes
5
answers
1k
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How should I understand the idea of relativity of space?
In the book General Physics by L.D.Landau, he mentioned the following in the first and second paragraph
The fundamental concept of mechanics is that of motion of a body with
respect to other bodies. ...
- 138
0
votes
3
answers
118
views
Relative Motion and Motion on ground
When I walk on the ground I know that it's me who is walking and not that I am just moving my legs forward and backward and the ground is moving.But according to relative motion I should not be able ...
- 103
2
votes
1
answer
66
views
How would we know whether a object is moving in deep space?
In deep space, there isn't anything we can compare our position with (According to my knowledge). In other words, we won't be able to define an origin so how would we know whether we are in motion or ...
- 883
0
votes
2
answers
91
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Why does these two masses not have same acceleration? [closed]
Assumptions: No friction , $m_2$=5kg and $z_1$=2kg. $z_2$ is fixed at its place.
Here, there is a mass of $5kg$ on a movable wedge of mass $2kg$. So, my question is that can we say that acceleration ...
- 33
1
vote
2
answers
428
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Apparent wavelength received by observer in doppler's effect
I have a few doubts about Doppler's effect.
Does the apparent wavelength received by the observer depend upon whether the observer is moving or not?
$λ_{apparent}=\ \frac{v_{sound}\pm v_{source}}{f}$....
- 292
0
votes
1
answer
41
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Velocity Gradient and Force in Air
I have experienced that when we go on a bike at a high speed, keeping our hands close to the surface of the bike is not much a problem and we feel negligible force which the air applies on us. But as ...
- 11
2
votes
2
answers
131
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Can I apply Newton's equations of motion to relative motion?
We know that
Velocity of A relative to B is
$$ \vec v_{A|B} = \vec v_A - \vec v_B $$
and Acceleration of A relative to B is
$$ \vec a_{A|B} = \vec a_A - \vec a_B $$
So, is it correct to do this to ...
- 227
-1
votes
2
answers
40
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Is this correct regarding velocity of train?
So many yellow T drawn are just different position of train at different instants.The person is standing still at all those instants at one place.
If a train is moving at 5m/s.
Then for me , can we ...
- 725
-2
votes
4
answers
490
views
Is this an exception to Newton's Second Law of Motion?
If a ball in an experiment is dropped from two different heights, 6 feet and 12 feet, why would we need to exert more force when we catch the ball that is dropped from the height of 12 feet? According ...
user282164
0
votes
2
answers
296
views
Why is relative motion at constant velocity the same as being at rest?
If I am a passenger who plays catching-the-ball game inside a vehicle that moves with a constant velocity in a straight road, why can I catch the ball repeatedly that as if the vehicle is at rest? How ...
user282164
6
votes
2
answers
680
views
How does the orbital motion of reduced mass tell us how the individual planets/stars move?
To give context to my question, here is Kepler's first Law restated in terms of reduced mass. Here, $\vec{r}$ is the position vector of the reduced mass whose origin lies at the centre of mass of the ...
- 181
0
votes
2
answers
91
views
Simple Harmonic Motion example [closed]
https://en.wikipedia.org/wiki/Escalator
https://en.wikipedia.org/wiki/Simple_harmonic_motion
Can we classify escalator device as a Simple Harmonic motion example?
- 111
0
votes
3
answers
112
views
What really pushes a rocket up?
To launch a rocket, fuel is burnt and is released in opposite direction relative to rocket and it pushes the rocket upwards because of third law of motion but the fuel molecules are not actually ...
- 171
1
vote
2
answers
547
views
Coriolis force and liquid on a rotating space station?
On a rotating wheel space station crewed by humans with sea-level conditions (temperature above the freezing point), if liquid was spilled on the floor am I correct in understanding that the Coriolis ...
- 269
1
vote
1
answer
46
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Swing in moving truck
I was just thinking about a situation in which a big truck is moving in high speed say ( $80 \ miles/hr$). There is a swing attached with the ceiling of the truck container which can move freely in ...
- 111