# Shared Flashcard Set

## Details

Motion and Forces
Flashcards for Motion and Forces Test
23
Science
02/02/2010

Term
 Motion
Definition
 The state in which one object distance from another is changing.
Term
 Reference Point
Definition
 The place or object used for comparison to determine if something is in motion.
Term
 Speed
Definition
 The distance an object travels divided by the time it took to travel that distance.
Term
 Velocity
Definition
 The speed and direction of an object
Term
 Slope
Definition
 Rise over Run
Term
 Acceleration
Definition
 The rate at which velocity changes. It can be increasing speed, decreasing speed or changing direction.
Term
 Formula for Acceleration
Definition
 Final Speed - Original Speed divided by Time
Term
 Force
Definition
 The mass multiplied by the acceleration.
Term
 Newton
Definition
 Unit of Force
Term
 Unbalanced Forces
Definition
 Forces that produce a nonzero net force, which changes the object's motion.
Term
 Balanced Forces
Definition
 Equal forces acting on an object in opposite directions.
Term
 Friction
Definition
 The force that one surface exerts on another when the two surfaces rub against each others.
Term
 Static Friction
Definition
 Friction acting on a stationary object (an object not in motion)
Term
 Sliding Friction
Definition
 Friction that occurs when two surfaces slide past one another.
Term
 Rolling Friction
Definition
 Friction that occurs when an object rolls over a surface
Term
 Fluid Friction
Definition
 Friction that occurs as an object moves through a fluid (air or liquid)
Term
 Gravity
Definition
 The force that pulls objects towards each other.
Term
 Mass
Definition
 The amount of matter in an object.
Term
 Weight
Definition
 The force of gravity acting on an object on the surface of a planet.
Term
 Free Fall
Definition
 The motion of a falling object when the only force acting on the object is gravity.
Term
 Air Resistance
Definition
 The fluid friction experienced by objects falling through the air.
Term
 Terminal Velocity
Definition
 The greatest velocity a falling object can achieve. Occurs when the force (gravity) pushing down equals the force (air resistance) pushing up.
Term
 Projectile Motion
Definition
 An object that is thrown.
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