Maybe, but an object is not at all necessary to be a reference point.
A reference point is just that, a point we refer to when comparing values. Zero degrees Kelvin is a reference point because all temperatures in Kelvin are relative to that zero degrees, absolute zero. No object there. The origin, p(0,0) on Cartesian Coordinates is a reference point because all other points on the graph are relative to it. And no object here either.
A space-time point (any point) can be designated a reference point and so all other space-time values, distance, speed, acceleration, etc. will be specified relative or referred to that designated point. If there is some object located at that reference point then we can use it to "compare another object's motion." But, my point, there need not be an object at that point at all.
The point in space and time to be designated as the reference point is the necessary and sufficient condition for distance and related properties. But granted, it is often convenient to have something there at the point so that everyone knows where it is. It's convenient, for example, to designate the space-time point occupied by planet Earth as the reference point for space-time problems. And Earth is the object at that reference point, so it's easy to find.
Bottom line. We now know there are few if any absolutes. Pretty much everything is relative to something. And that something must be designated as the reference point if we are all to be on the same page in physics and other sciences.
A reference point is a starting point where a measurement can be made by an observer of the measurement. Basically no two measurements can be made at the same time using the same frame of reference. This principle is called the Heisenberg indeterminacy principle.That means we cannot measure the motion of two objects simultaneously using the same of reference without an error.
All 4 questions the respond is( A) i'm somewhat uncertain approximately question 3 however. you ought to to sort it into google. yet i think that's a and that i understand all the different questions are answer A In connection with above answer for #2 speed is velocity. Trajectory would be direction. so the respond is A
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Yes, it is.
Maybe, but an object is not at all necessary to be a reference point.
A reference point is just that, a point we refer to when comparing values. Zero degrees Kelvin is a reference point because all temperatures in Kelvin are relative to that zero degrees, absolute zero. No object there. The origin, p(0,0) on Cartesian Coordinates is a reference point because all other points on the graph are relative to it. And no object here either.
A space-time point (any point) can be designated a reference point and so all other space-time values, distance, speed, acceleration, etc. will be specified relative or referred to that designated point. If there is some object located at that reference point then we can use it to "compare another object's motion." But, my point, there need not be an object at that point at all.
The point in space and time to be designated as the reference point is the necessary and sufficient condition for distance and related properties. But granted, it is often convenient to have something there at the point so that everyone knows where it is. It's convenient, for example, to designate the space-time point occupied by planet Earth as the reference point for space-time problems. And Earth is the object at that reference point, so it's easy to find.
Bottom line. We now know there are few if any absolutes. Pretty much everything is relative to something. And that something must be designated as the reference point if we are all to be on the same page in physics and other sciences.
A reference point is a starting point where a measurement can be made by an observer of the measurement. Basically no two measurements can be made at the same time using the same frame of reference. This principle is called the Heisenberg indeterminacy principle.That means we cannot measure the motion of two objects simultaneously using the same of reference without an error.
All 4 questions the respond is( A) i'm somewhat uncertain approximately question 3 however. you ought to to sort it into google. yet i think that's a and that i understand all the different questions are answer A In connection with above answer for #2 speed is velocity. Trajectory would be direction. so the respond is A
exactly