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Imagine a person riding past in a car who looks at you says to you "I'm not moving. I am sitting still in my car. YOU are moving!"
An airline passenger flying overhead then looks down at both of you, and reports "I'm up here sitting still, and BOTH of you guys are moving!".
And an astronomer working at the observatory on the moon, taking a break and using his super-duper telescope to see what's shaking back on earth, watches the events on Earth and, and sees clearly that ALL THREE of you are moving.
Now here's the important part: all perspectives are correct ! There is no such thing as absolute motion - all mostion is relative to the observer, or the person who is measuring the movement.
What else can I help you with?
Why must motion be with respect to the oberver?
That simply means that there is NO WAY to define or measure an "absolute motion".Any experiment you do will be the SAME for different observers - in the sense that it is unaffected by relative velocities.
When is a body said to be in motion in relation to an observer?
when position of the body with respect to an observer change with time then the body are said to be in motion.
What is The motion of the pulse with the respect to the source?
The motion of a pulse is affected by the motion of the source. If the source is moving towards the observer, the pulse will be compressed and its frequency will increase. If the source is moving away from the observer, the pulse will be stretched out and its frequency will decrease.
The length of a rod as measured by an observer moving with respect to it is half of its proper lenght the speed of the observer with respect to rod is?
The speed of the observer with respect to the rod is half the speed of light. This is due to the Lorentz contraction effect at relativistic speeds, where lengths appear contracted in the direction of motion as observed from a different frame of reference.
How the apparent motion of a object depend on the observer motion?
The apparent motion of an object can vary depending on the motion of the observer. This is due to the concept of relative motion, where the perception of an object's movement is influenced by the observer's own motion. For example, if the observer is moving towards an object, the object may appear to move faster than if the observer is stationary.
Motion is described with respect to a what?
With respect to a state of rest or apparent rest.
Why must motion be with respect to the oberver?
That simply means that there is NO WAY to define or measure an "absolute motion".Any experiment you do will be the SAME for different observers - in the sense that it is unaffected by relative velocities.
When is a body said to be in motion in relation to an observer?
when position of the body with respect to an observer change with time then the body are said to be in motion.
What is The motion of the pulse with the respect to the source?
The motion of a pulse is affected by the motion of the source. If the source is moving towards the observer, the pulse will be compressed and its frequency will increase. If the source is moving away from the observer, the pulse will be stretched out and its frequency will decrease.
The length of a rod as measured by an observer moving with respect to it is half of its proper lenght the speed of the observer with respect to rod is?
The speed of the observer with respect to the rod is half the speed of light. This is due to the Lorentz contraction effect at relativistic speeds, where lengths appear contracted in the direction of motion as observed from a different frame of reference.
How the apparent motion of a object depend on the observer motion?
The apparent motion of an object can vary depending on the motion of the observer. This is due to the concept of relative motion, where the perception of an object's movement is influenced by the observer's own motion. For example, if the observer is moving towards an object, the object may appear to move faster than if the observer is stationary.
From the perspective of a stationary observer, does time for an object in motion relative to the observer"?
Yes, time for an object in motion relative to a stationary observer appears to pass slower.
Explain why motion can only be described in comparison to a reference?
Motion is relative, meaning it must be described with respect to a reference point or frame of reference. This is because direction and speed are defined in relation to the reference point, and an observer's view of motion can change depending on their perspective. Without a reference point, it would be impossible to determine if an object is moving or at rest.
Why does an observer use a frame of reference to detect motion?
An observer uses a frame of reference to detect motion because motion is relative and depends on the observer's point of view. By using a frame of reference, the observer can establish a stationary point against which to measure an object's position and velocity. This helps in determining whether an object is in motion or at rest relative to the observer.
How does apparent motion of an object depend on the observer and in motion?
The apparent motion of an object depends on both the observer's perspective and the motion of the object itself. As the observer moves, their angle of view and distance from the object change, altering how the object appears to move relative to them. In addition, the speed and direction of the object's actual motion will impact how it appears to move to the observer.
For the Doppler effect to occur what must happen?
For the Doppler effect to occur, there must be relative motion between the source of the wave and the observer. As the source moves towards or away from the observer, the frequency of the wave appears to change, causing a shift in the perceived wavelength.
What affects how an observer views motion?
The observers motion in relation to what he observes.
