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All motion is relative

Updated: 8/11/2023
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14y ago

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All motion is relative. The question "is this object moving?" is in fact meaningless unless we specify "moving relative to what other object". Similarly, there is no such thing as "absolute rest": it's just as true to say that the road is moving at 50 km/h relative to your car as it is to say that your car is moving at 50 km/h relative to the road.

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13y ago
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11y ago

Motion is change in position with respect to, or relative to another body.

All motion is relative because we do not know of a point in the universe which is absolutely FIXED. That means that we can never tell which body in the universe is actually moving. We can only say that a body is moving RELATIVE to another body. We assume that one of the bodies is "at rest", but we know that rest means nothing more than "rest" Relative to another body. In other words, we can never tell whether a body is really in motion or at rest. It is impossible to know. Anyone who insists that the earth or the sun is moving has not understood the nature of motion. Absolute rest and absolute motions are fictions.

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14y ago

Yes, all motion is relative. The question "is this object moving?" is in fact meaningless unless we specify "moving relative to what other object". Similarly, there is no such thing as "absolute rest": it's just as true to say that the road is moving at 50 km/h relative to your car as it is to say that your car is moving at 50 km/h relative to the road.

Einstein reputedly said: "what time does Oxford arrive at this train".

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10y ago

Is a car moving in the parking lot? Compared to the ground, no, but compared to the sun, yes the car is moving with the earth around the sun. On a train, all passengers are moving relative to the earth, but not moving when compared to each other. Walking in the train car you may move 20 meters in 10 seconds compared to the floor. Whether the train is moving or not you put forth the same energy for the walk. But if the train is stationary you moved 20 meters. If the train is moving you probably moved more than that. So your motion is relative to the earth and the train.

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10y ago

relative motion is predominantly horizontal (fault)

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Related questions

All motion is relative to what?

All motion is relative to yourself, as there is no fixed point anywhere in our universe, as it is all traveling away from the center of the big bang. But if we ever find where the bigbang happened, that would be where all motion is relative to


What is the definition of the word relative motion?

Relative motion is the concept that the motion of all objects is relative to other objects. If you are sitting still right now you are not moving relative to the earth, however you are moving relative to sun.


When we can say the object is in motion?

When its position is changing relative to our position. Note: all motion is relative to something else.


Does friction oppose motion or relative motion of surfaces in contact?

Relative motion


Does friction oppose motion or relative motion of surface in contact?

Relative motion


Motion relative to observers frame of?

Motion is relative to an observer's frame of Reference.


A body which is in both rest and motion?

At rest and in motion are relative terms. When we say 'in motion' or 'at rest' we mean relative to something else. If you were travelling in a car for instance, you would be at rest relative to the car but in motion relative to the outside world.


Is motion relative or absolute?

motion is realtive


Can an object be at rest as well as in motion at the same time?

An object can be at rest relative to a second object whilst in motion relative to a third object.For example, if you sit still then relative to the Earth you are at rest. However the Earth is both spinning on its axis and travelling around the Sun, so relative to an observer in space you are in motion. Einstein showed us that all such concepts are relative.


Can an object be at rest as well as in motion at same time?

An object can be at rest relative to a second object whilst in motion relative to a third object.For example, if you sit still then relative to the Earth you are at rest. However the Earth is both spinning on its axis and travelling around the Sun, so relative to an observer in space you are in motion. Einstein showed us that all such concepts are relative.


Can an object be at rest as well in motion at the same time?

An object can be at rest relative to a second object whilst in motion relative to a third object.For example, if you sit still then relative to the Earth you are at rest. However the Earth is both spinning on its axis and travelling around the Sun, so relative to an observer in space you are in motion. Einstein showed us that all such concepts are relative.


What is your idea about G person who travelling with his friends in a cartis he in motion or in rest?

He is in motion relative to me, and he is at rest relative to his friends. There is no 'real' rest or 'real' motion. It's always measured relative to something else.