An object at rest stays at rest due to inertia, which is its tendency to resist changes in motion. Inertia also helps an object in motion to continue moving in a straight line unless acted upon by an external force, such as friction or gravity.
...by an unbalanced force
unbalanced force
An object moving at a constant velocity in a straight line. An object at rest or moving at a constant speed in a circular path. An object moving in a straight line with no change in direction.
An object with a distance-time graph that is a straight line parallel to the time axis is not moving, it is at rest. The object is not changing its position with respect to time.
That is inertia. Inertia is the tendency of an object to remain in its state of motion (either at rest or moving in a straight line) unless acted upon by an external force.
Inertia
...by an unbalanced force
An object moving at a constant speed in a straight line has an acceleration of 0. An object at rest also has an acceleration of 0. So, the two things I see in common are their accelerations, which are both 0.
unbalanced force
An object moving at a constant velocity in a straight line. An object at rest or moving at a constant speed in a circular path. An object moving in a straight line with no change in direction.
An object with a distance-time graph that is a straight line parallel to the time axis is not moving, it is at rest. The object is not changing its position with respect to time.
It's Newton's first law of motion: "An oject in motion will stay in motion (with the same velocity) until an outside force acts upon it and an object at rest will stay at rest until an outside force acts upon it."
No. It means that the object is going at a constant speed.
A straight horizontal one does.
It is called "inertia", but we still don't really know what it is.
That is inertia. Inertia is the tendency of an object to remain in its state of motion (either at rest or moving in a straight line) unless acted upon by an external force.
The law of Inertia. An object at rest stays at rest and an object in motion will stay in motion in a straight line unless acted upon by an outside force.