# Shared Flashcard Set

## Details

nln study guide
Physics vocab
24
Physics
09/25/2006

Term
 Momentum
Definition
 An object traveling at a specific velocity has a qauntity. (all moving objects)
Term
 Conservation of momentum
Definition
 The total momentum of an isolated system is always constant. When two objects collide, they transfer energy, it is not lost
Term
 Newton's First Law
Definition
 Inertia, which states that objects in motion tend to stay in motion, and objects at rest tend to stay at rest. Resists any change in motion.
Term
 Newton's Second Law
Definition
 Describes the relationship between force, mass, and acceleration.States that the force applied on an object equals the mass of the object times the acceleration of the object.F=ma (force= mass * acceleration)
Term
 Newton (N)
Definition
 The unit that represents a force that accelerates a mass of 1 Kilogram 1meter per second.
Term
 Joule
Definition
 Is the unit of energy equal to the work done by a force of one newton acting over a distance of one meter.
Term
 Friction
Definition
 is the force that opposes the relative motion or tendency of such motion of two surfaces in contact.
Term
 Gravity
Definition
 the force of attraction between all masses in the universe
Term
 Weight
Definition
 is the force exerted upon an object by virtue of its position in a gravitational field
Term
 Lever-arm
Definition
 The distance from the axis of rotation to the point where the force is exerted
Term
 Torque
Definition
 the ability of a force that is applied perpendicularly to rotate an object around and axis, such as a ball on a string,
Term
 Energy
Definition
 Defined as the abilit to do work.
Term
 Kinetic energy
Definition
 energy associated with motion.
Term
 Potential energy
Definition
 is the stored energy that a body has because of its position. ex. when you lift an object up
Term
 Work
Definition
 defined as the product of the force applied to a object and the distance through which the force is applied.
Term
 Power
Definition
 is the rate at which work is done.
Term
 inclined plane
Definition
 a slanted surface used to raise an object.
Term
 Wedge
Definition
 a moving incined plane
Term
 Screw
Definition
 an inclined plane wrapped around a clinder
Term
 Lever
Definition
 A simple machine that is free to move around a fulcrum when force is applied.
Term
 Pulley
Definition
 A chain or rope wrapped around a wheel.
Term
 Wheel and axel
Definition
 a lever that rotates in a circle
Term
 compound machine
Definition
 a combination of two or more simple machines.
Term
 Efficiency
Definition
 is the work done divided by the energy used to power the machine, or the comparison of work input to work output.
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