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Inertia.
Angular acceleration
Inertia is the tendency of objects to keep moving in a straight line. They "want" to go in a straight line, so to speak. However that is changed when a force acts on them. In the case of planets, that force is the gravitational force between the planet and the Sun.So that's why planets orbit the Sun instead of traveling in a straight line.
Because there is no air in space, there is no friction to slow said object down.
it is called inertia
inertia
It is called inertia.
That's just a special case of inertia. In general, objects have the tendency to move in a straight line, and at a constant speed, when no force is acting on them.
The normal tendency of objects - when no force acts on them - is to move in a straight line, at a constant speed and direction (that is, a constant velocity). However, when there is a force, an object's velocity may be changed. That's what happens to the Moon, as well as to other objects in some orbit. In this case, the force is provided by gravitational attraction from Earth.
As you can observe, they will not ALWAYS be at rest. Objects have a tendency to remain at rest, because:* Inertia means that if no force acts on an object, it will remain at rest if it was at rest; or, if it was moving, it will continue moving at the same velocity. * Friction forces will usually slow objects down.
Inertia.
Inertia.
Inertia
Angular acceleration
It is the natural tendency of moving objects to continue moving. It won't suddenly stop, unless it crashes into some planet or something.
Inertia is the tendency of objects to keep moving in a straight line. They "want" to go in a straight line, so to speak. However that is changed when a force acts on them. In the case of planets, that force is the gravitational force between the planet and the Sun.So that's why planets orbit the Sun instead of traveling in a straight line.
Inertia is the tendency that all objects resist a change in motion