Motion is the change in distance between two things. One of those "things" is a reference point to which the other thing is being compared. For example, in a race, my fixed point or reference point is the starting line. I move away from it toward the finish line. There is a change in distance between the starting line and me.
A reference point shows the relation of an object and a moving/non-moving object. If you were in a hot-air balloon you would use a bird flying in relation to your hot-air balloon. To see if the bird changed position in relation to you.
If you're reading a book in an airplane and it happens to fly over your friend's house,
your friend says that the book is moving at 350 miles per hour. But at the same time,
you say that the book isn't moving at all, and that's why you're able to read it easily.
You and your friend are both correct. In his reference frame, you and the book are both
moving at 350 miles per hour. In your reference frame, the book isn't moving at all.
Relative motion, you on the train, relatively theres no motion of the train even though its moving.
You at the station, the train is moving, nothings changed except your point of view or reference point.
As regards the relationship between motion and a reference point, you can use a reference point to describe the direction of an object's motion.
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Frame Of Reference. which means a framework that is used for the observation and mathematical description
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Any moving object can be redefined as a frame of reference at rest, from which all other moving frames can be measured. That's a fundamental precept of Relativity. It's motion is defined only in relation to some other object from which the motion is measured, so reselection as the rest frame is necessary, but once established as a rest frame, it is (for the purpose of measurement) no longer considered to be in motion. Since everything is moving in relation to everything else, any frame can be selected as the frame of reference at rest, with all other motion measured relative to it.
Work is force X distance travelled. Force is mass x acceleration. Aceeleration depends on the frame of reference from which one is measuring it. Hence work done depend on the frame of reference from which one is measuring it. QED
The second law of Newton says that the sum of all the forces acting on an object is equal to the acceleration of this object, in a given frame of reference. If the sum of forces isn't equal to zero, therefore the acceleration isn't to. So the object has a speed and is in motion, in the frame of reference chosen.
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Frame Of Reference. which means a framework that is used for the observation and mathematical description
A tree can be used for a frame of reference for the motion of a snowboarder.
A tree can be used for a frame of reference for the motion of a snowboarder.
the inertial reference frame is not absolute. because motion is not absolute. motion is relative depends on who's looking/observing.
Motion is relative to an observer's frame of Reference.
Relative motion is movement in relation to a frame of reference.
usually the motion of your frame of reference is 0. When you are in a train going 50 mph, your frame of reference would be you are going 0 mph and the tracks are traveling at -50 mph.
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Absolute motion is motion relative to a presumed absolute reference frame. Special Relativity posits that the laws of nature are perfectly symmetrical with respect to any inertial reference frame. This implies that there is no absolute reference frame, and that absolute motion is a useless concept.
That's right, motion cannot be measured unless you have some frame of reference within which to measure it.
frame of reference