The product of mass multiplied by acceleration.
The force that resists motion when the surface of one object comes into contact with the surface of another.
The tendency of an object in motion to remain in motion, and of an object at rest to remain at rest.
A situation involving two variables, in which one of the two increases in direct proportion to the decrease in the other.
A principle, put forth by Sir Isaac Newton (1642-1727), which states that every object in the universe attracts every other one with a force proportional to the masses of each, and inversely proportional to the square of the distance between them.
A measure of inertia, indicating the resistance of an object to a change in itsmotion.
A term describing the rate of fall for an object experiencing the drag force of air resistance. In a vacuum, the object would continue to accelerate with the force of gravity, but in most real-world situations, air resistance creates a powerful drag force that causes a leveling in the object's rate off all.
Space entirely devoid of matter, including air.
A measure of the gravitational force on an object; the product of mass multiplied by the acceleration due to gravity.