How many observers are needed to calculate the relativistic speed equation?

In summary, the conversation discussed the use of relativistic speed equations and the number of observers needed for calculations. It was concluded that two reference frames and one object are required for the formula, and observers are not necessary for the calculations. However, if attached to an observer, they can be used as the object in the formula.
  • #1
Quarlep
257
4
I am studying the relative speed equations but I confused in one point.
We need (at least) how many observers to calculate relativistic speed equation.
Three or two.
 
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  • #2
What do you mean with "relativistic speed equation"?

You do not need observers, you can do this with pen and paper without observing actual experiments at all. It can be useful to imagine what multiple different observers would see, but they are not a necessary part for calculations.
 
  • #3
I mean let's think there's two observers and nothing else.Can we use relativistic speed equation in these situations.

Relativistic speed equation
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  • #4
To use that formula you need two reference frames (with relative velocity u) and one object (with velocity v relative to one frame).

Whether or not any of the frames are attached to an observer is not relevant. But if they are attached to an observer then the observer can certInly be used as the object.
 
Last edited:

What is the relative speed equation?

The relative speed equation is a mathematical formula used to calculate the speed of an object in relation to another moving object or frame of reference. It takes into account the velocities of both objects and their direction of motion.

How is the relative speed equation derived?

The relative speed equation is derived from the principles of vector addition and subtraction. It involves breaking down the velocities of the two objects into their horizontal and vertical components and then using trigonometric functions to calculate the resultant velocity.

Why is the relative speed equation important?

The relative speed equation is important because it allows us to understand and predict the motion of objects in relation to each other. It is used in various fields such as physics, engineering, and astronomy to solve problems involving moving objects.

Can the relative speed equation be used for objects moving in different directions?

Yes, the relative speed equation can be used for objects moving in different directions. It takes into account the direction of motion of each object and calculates the resultant velocity accordingly.

Are there any limitations to the relative speed equation?

Yes, the relative speed equation has some limitations. It assumes that the objects are moving in a straight line at a constant speed, and it does not take into consideration factors such as acceleration, air resistance, or gravitational effects. It is also only applicable to non-relativistic speeds.

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