That's completely true. The only thing I can measure is how fast an object
is moving past me.
If you come along and ask me "But how fast was it reallymoving ?", that's
a meaningless question. There's no such thing as 'real' motion, only motion
compared to something.
Notice that there's actually no such thing as "at rest", or "motionless".
If I measure the speed of something and it turns out to be zero, then
that only means that the object and I are both moving at the same speed
and in the same direction.
Example ? Sure. How about the book in your lap, that you were reading
until you drifted off in your comfortable reclining seat, on a passenger jet
that I observe to be 5 miles above the ground moving at 350 miles an hour.
Since I am unable to know what other object is described, I am unable to see how the motion of two objects are relative to it. I recommend resubmitting your question with additional information so we are able to better assist you.
By using an Arrow (VECTOR) to represent its SPEED and DIRECTION. Where the Arrow points is its Direction of Motion, and its LENGTH (magnitude) is its SPEED.
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.
gravitational
Kinetic friction is any friction between objects that are in contact and have relative motion. The specific term for objects that roll across other objects is aptly called rolling friction. Rolling friction exerts its force in the opposite direction of its motion.
Motion is always relative to the observers frame of reference. For example, if two people were standing facing each other, and a dog walked between them, one person would observe the dog's motion as going to the right, and the other person would observe the dog's motion as going to the left.
They are the exact same. If an object is standing still, it is in motion. Everything in the world is in motion. Not because of the earth moving, it is because particles in all objects are moving.
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.
gravitational
Two objects basically, 1 changing position relative to the other from where its being observed.
when two bodies change their positions with time, it's termed as motion and if the motion continues it may begin to have velocity,acceleration etc
Motion is calculated by comparing it to something else which may or may not be stationary. Hence you are measuring it's motion relative or in relation to the other object.
Relative age.
Tribology is the looking at interacting surfaces in relative motion and trying to engineer them. It looks at how wear, lubrication and friction impact how objects act with each other.
They are both forms of friction. rolling friction occurs because two objects are rubbing against each other. under a microscope you would see that the two objects have bumps and these bumps run into each other, causing both objects to change velocity. thus rolling friction resists the relative motion of two objects. however, static friction occurs when two objects are pressed against each other and they have the same velocity, the microscopic bumps have time to sink in to each otherand creates a better grip than rolling friction. thus static friction resists any relative motion between two objects and is the reason why pushing a car is sudenly easier when it has some motion.
When objects are bound gravitationally in centrifugal motion, the objects are said to be in orbit of each other.
Objects that move around other objects in the universe are said to be orbiting it, or in orbit.
Kinetic friction is any friction between objects that are in contact and have relative motion. The specific term for objects that roll across other objects is aptly called rolling friction. Rolling friction exerts its force in the opposite direction of its motion.
Objects that move around other objects in the universe are said to be orbiting it, or in orbit.