# Newton's Three Laws of Motion

Pages: 2 (621 words) Published: April 11, 2013
In 1687, Sir Isaac Newton published what are known today as Newton's three laws of motion. If these laws didn't exist, motion and life would not exist. His three laws are accurately relative to what "normal" speeds are on earth. Newton's first law is most commonly referred to as the law of inertia. The law states that an object that is at rest will stay at rest unless an unbalanced force acts upon it, and vice-versa. If an object is moving and there is no force to move the object in a different direction, then the said object will move in the path it's in for an indefinite period of time. Newton's law of inertia is only relative to what people experience on earth, though it is still considered a law for it is not relative to the human condition to regularly find yourself or others moving at 600 MPH while walking. As an example, suppose that a meteor is hurtling towards planet earth's precious moon, and will obliterate it into a bunch of tiny space rocks that will mess up the ocean tides and NASA's moon research. That meteor will continue to hurtle until it comes into contact with a force that will either change its direction or stop its motion. Unless the Internationale Space Station steers itself into position, the moon would be the force to stop the meteor from traveling through space for another umpteen decades. Without the law of inertia, EVERYTHING would always be moving or NOTHING would be able to move. Newton's second law of motion ensures that the more force there is on an object, the more acceleration there is. That means that the total force on an object is equal to the rate of change of its momentum; force all depends on the object's mass and acceleration. The only way a single moving object's momentum will change on its own (with no force acting upon it) is if the object were to gain or lose any mass. Force= mass • acceleration, so for a greater amount of mass and acceleration, an even greater amount of force is needed.. For...