# Shared Flashcard Set

## Details

Motion, Forces and Energy
Chapter 2
21
Physics
05/09/2008

Term
 balanced forces
Definition
 equal forces acting on an object in opposite directions
Term
 air resistance
Definition
 the fluid friction experienced by falling objects through the air
Term
 centripetal force
Definition
 a force that causes an object to move in a circle
Term
 fluid friction
Definition
 friction that occurs when an object moves through a fluid
Term
 force
Definition
 a push or pull exerted on an object
Term
 free fall
Definition
 the motion of a falling object when the only force acting on it is gravity
Term
 friction
Definition
 the force that one surface exerts on another when the two rub against each other
Term
 gravity
Definition
 the force that pulls objects toward Earth
Term
 inertia
Definition
 the tendency of an object to resist any change in motion
Term
 law of conservation of momentum
Definition
 the rule that the total momentum of objects in an interaction doesn't change
Term
 mass
Definition
 the amount of matter in an object
Term
 momentum
Definition
 the product of an object's mass and velocity
Term
 net force
Definition
 the overall force on an object when all the individual forces acting on it are added together
Term
 Newton
Definition
 a unit of measurement that equals the force required to accelerate one kilogram of mass at 1 meter per second per second
Term
 projectile
Definition
 any object that is thrown or shot through the air
Term
 rolling friction
Definition
 friction that occurs when an object rolls over a surface
Term
 satellite
Definition
 any object that travels around another object in space
Term
 sliding friction
Definition
 friction that occurs when one solid surface slides over another
Term
 terminal velocity
Definition
 the maximum velocity a falling object can achieve
Term
 unbalanced force
Definition
 a nonzero net force, which changes an object's motion
Term
 weight
Definition
 the force of gravity on an object at the surface of a planet
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