Because Newton's 1st law of motion is... An object at rest will stay at rest unless acted on by an ublanced force. An object in motion will stay in motion and the same direction unless acted on by an ublanced force.
Newton's First Law called the Law of Inertia, deals with objects having constant motion staying in a straight-line.
newtons laws are idealised and don't involve external forces like friction and air resistance
Neither is true. It applies to both.
Balanced forces keep object in its state of motion (moving or at stop). An objects state of motion can be altered when it is subjected to an unbalanced force. This reflects Newtons first law of motion.
An object in motion will not change its motion unless acted on by an external force. This applies to zero motion also.
the law of inertia
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Law of Inertia.
talks about the inertia '
The First!
motion
Newton's First law of motion: "Objects in constant motion, remain in constant motion - unless acted upon by a force" Newton's Second law of motion: "The force exerted on an object is equal to it's mass, multiplied by the acceleration of the object" Newton's Third law of motion: "For every action, there is an equal and opposite reaction"