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Unit 1: Motion

Lessons 1-5 Unit 1

TermDefinition
Position the location of an object
Reference Point a location to which another location is comapared
Motion an object's change in position relative to a reference point
Speed the distance traveled divided by the time interval during which the motion occured
Vector a quantity that has both size and direction
Velocity the speed of an object in a particular direction
Acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
Centripetal Acceleration the acceleration directed toward the center of a circular path
Force a push or a pull exerted on an object in order to change the motion of the object; force has size and direction
Net Force the combination of all of the forces acting on an object
Inertia the tendency of an object to resist a change in motion unless an outside force acts on the object
Gravity a force of attraction between objects that is due to their masses
Free Fall the motion of a body when only the force of gravity is acting on the body
Orbit the path that a body follows as it travels around another body in space
Fluid a non-solid state of matter in which the atoms or molecules are free to move past each other as in a gas or liquid
Pressure the amount of force exerted per unit area of surface
Pascal the SI unit of pressure
Atmospheric Pressure the pressure caused by the weight of the atmosphere
Buoyant Force the upward force that keeps an object immersed in or floating on a liquid
Archimedes' Principle the principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces
Created by: 18dzekicd0310
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