All Questions
37
questions
2
votes
3
answers
65
views
If an observer was trapped in a closed box with no way to interact with the external surroundings how will he know if he is moving or at rest [duplicate]
I am a high-school student. Recently we learned the concepts of relative motion and velocity. The idea that anything in motion can subsequently be at rest depending on the frame of reference ...
- 21
0
votes
3
answers
84
views
Conceptual meaning of frame of reference for kinetic energy
what does the statement
The speed, and thus the kinetic energy of a single object is frame-dependent (relative)
even mean? does the impact of a collision of moving bodies and henceforth transfer of ...
0
votes
2
answers
74
views
Accelerating body in a non-inertial frame of reference
If a body is subjected to a force, can I find a non-inertial frame of reference in which the body is not accelerating?
- 21
0
votes
3
answers
127
views
Relativity of bodies in motion in space
I have learnt that if we are travelling in space we have no way to tell if we are moving towards something or if it is the something that is moving towards us; to either object they judge that they ...
- 1
-2
votes
1
answer
40
views
Why does relative speed of light when in a non-inertial frame does not increase when viewed from an inertial frame [duplicate]
I mean to ask if I have a moving object and I turn on a bulb in that moving object, when viewed from an inertial frame, we usually add the speed of the moving object with the object's velocity to get ...
- 97
0
votes
2
answers
235
views
Velocity of one particle w.r.t. another
Let us say that two particles $p_1$ and $p_2$ are moving in an inertial frame fixed to some point on earth. Call this frame as world frame. The velocity of $p_1$ is $(v_{1x}, v_{1y})$ in $x-y $ ...
- 123
4
votes
5
answers
711
views
Can't understand a statement about motion
From the book where I am studying motion, It says
Motion is a combined property of the object under study and the observer. There is no meaning of rest or motion without the viewer.
I know that, for ...
- 157
0
votes
0
answers
117
views
If motion is relative, can we say that the Earth doesn't revolve around the Sun? [duplicate]
Considering motion to be relative, consider these two cases as follows
An observer is standing on the sun and observing the earth and the earth has no background (no stars and stuff in the background)...
- 183
0
votes
1
answer
39
views
${}$Reference frames [duplicate]
Most of the particles have different velocity in different reference of frames but why is speed of light the same in all refrence frames? After all light is made of a photon.
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 ...
0
votes
2
answers
286
views
Change in Kinetic Energy in two different reference frames (one of them non-inertial) [duplicate]
Let's say an object of mass 10 kg is fired from a cart of mass 90 kg. The object and the cart, of total mass 100 kg were initially moving together with a speed of 10 m/s. Then, the object is fired by ...
- 95
0
votes
2
answers
470
views
Who applies the force on the things moving backward that we see when moving forward? [duplicate]
When we move forward in a car, things around us move backward. I understand some force is being applied on the car that is the reason for its forward movement. But what is the source of force on the ...
- 823
-2
votes
1
answer
121
views
Reasoning pseudo force due to accelerating car mathematically [closed]
For a person inside an acceleration car, his acceleration inside the frame is $a_{\text{rev}}$ , outside the car is accelerating at $a_{\text{car}}$ and person inside is accelerating at a rate of $a_{\...
- 7,980
0
votes
2
answers
248
views
Taylor's Classical Mechanics - Confusion About Reference Frame
I am hoping to dig a little deeper into what Taylor says on page 9 of Classical Mechanics. I've provided an excerpt just below:
A more important difference arises when two frames are in relative ...
- 1,095
1
vote
2
answers
122
views
Non-uniform relative motion between inertial reference frames?
I have the following doubt: let person A be in free fall being gravitationally attracted towards a massive body M. Suppose then that person B is completely isolated in space and in particular very far ...
- 193