Term

Definition
The force that acts to resist the relative motion (or attempted motion) of objects or materials that are in contact. 


Term

Definition
The property of any body to resist changes in its state of motion. Mass is the measure of inertia. 


Term

Definition
A physical quantity varies inversely as another quantity squared. Example: Illumination varies inversely as the square of the distance from the source. 


Term

Definition
The fundamental SI unit of mass. One kilogram (symbol kg) is the amount of mass in one liter of water at 4 °C. 


Term

Definition
Every body continues in its state of rest, or of motion in a straight line at constant speed, unless acted upon by a nonzero force. Also known as Newton's first law. 


Term
Law of universal gravitation 

Definition
For any pair of objects, each object attracts the other object with a force that is directly proportional to the product of the masses of the objects, and inversely proportional to the square of the distance between their centers of mass 


Term

Definition
A measure of an object's inertia; also a measure of the amount of matter in an object. Depends only on the amount of and kind of particles that compose an objectnot on its location (as weight does). 


Term

Definition
SI unit of force. One newton (N) is the force applied to a onekilogram mass that will produce an acceleration of one meter per second per second. 


Term
Universal gravitational constant 

Definition
The constant G in the equation for Newton's law of universal gravitation; measures the strength of gravity. 


Term

Definition
The force on a body due to the gravitational attraction of another body (commonly Earth). 

