Any and all matter.
Inertia.
gravity
If two forces acting on an object are equal and opposite, then the net force acting on the object is zero. If the net force acting on an object is zero, then the object's velocity will not change. If it is already moving, then it will continue to move in a straight line at that same velocity. If it is not already moving, it will stay stationary.
Unbalanced force is a type of force that causes an object to start moving.
-- An unbalanced group of forces on an object causes the object to accelerate in the direction of the net force. -- If an object is not moving, then the group of forces on it must be balanced, else it would be accelerated.
Forces
what starts to move an object is force because it's pushing on the object and what stop's the obect from moveing is force too because if the force is going the oppisit way its going to stop the object.
It's not necessary to specify that the object is moving at a constant speed. Any object with no outside forces acting on it does that. It also continues moving in a straight line.
unbalanced
Balanced forces will not change the velocity - speed and direction - of a moving object. the object will continue to move in the same way.
Then the result will be the same as if NO forces act on the object (since the sum of the forces is zero). The object will continue moving in a straight line, at constant speed.
Due to plate tectonics still moving, it causes the Earth's oceans and continents to continue moving.
The energy that causes moving objects to continue moving is called momentum.
causes rolling resistance forces
ala ko kabalo...
No force makes the Earth move. It has enough momentum to continue moving through space.
Either no force at all, or else a group of forces whose vector sum is zero ... often known as a 'balanced' group of forces.
Things will eventually stop if there is a force to stop it... and no force that keeps it moving. If there are no forces on an object, or the forces are balanced (the friction forces on a car are compensated by forces that pull it forward), it will continue moving.
Friction. And somewhat the gravity, which causes the friction.