Newtons Laws

Topics: Newton's laws of motion, Classical mechanics, Force Pages: 2 (667 words) Published: June 2, 2012
Newton’s I, II, & III Law

Newton’s three laws of motion explain everything that happens to objects in Earth. Anything from kicking a ball to a human being walking is explained by Newton’s three laws of motion. They explain something different of the motion of an object, put together they explain everything. In order they are; Newton’s First Law: The law of inertia; Newton’s Second Law: The law with the concept of acceleration; Newton’s Third Law: The Law of Action & Reaction.

Newton’s 1st law states that any object at rest will remain at rest or if its moving it will remain moving at a constant speed until force is has acted upon it or is exerted on it. For example, a ball will remain at rest until a force acts upon it. Yet, it will keep going at a constant speed unless another force overpowers it. When a force is applied it doesn’t necessarily have to be one force, it can be multiple. Those forces could include gravity, friction, and your own. In order for this law to be applied to an object, it must be in equilibrium. An object is only equilibrium if the vector sum of all forces equals zero. With these forces & objects also experience acceleration explaining the connection with the two laws.

In addition, Newton’s Second Law states that forces acting upon an object go through acceleration. Acceleration is a change in velocity or speed. For example, a ball going down on an inclined plane will go through certain acceleration. It will usually keep gaining speed during each time interval. However, an object will not accelerate forever, the faster an object goes the less it acceleration it has. When its acceleration reaches zero it has reached its terminal velocity. Generally, the heavier an object is the harder it is to get it to accelerate. The bigger the mass, the more force is required to accelerate. Also, an object’s acceleration could be affected by friction and air drag. Air drag applies to all objects even if it’s in free fall or not,...
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