Physics

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hypothesis

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an explanation that's based on prior scientific research or observation and can be tested

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system

Back 2

a set of particles or interacting components considered to be a distinct physical entity for the purpose of study

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sig figs

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digits in a measurement that are known with certainty plus the first digit that is uncertain

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components of a vector

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the projections of a vector along the axes of a coordinate system

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acceleration

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the rate at which veloctiy changes over time

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frame of reference

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system for specifying the precise location of objexts in space and time

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average velocity

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total displacement divided by time interval during which the displacement occured

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vector

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physical quantity that has both magnitude and a direction

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free fall

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motion of a body when only force due to gravity is acting on the body

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model

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a pattern, plan , representation, ordescription designed to show the structure of workings of an object, system or concept

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instantaneous velocity

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velocity of an object at some instant or at a specific point in the object's path

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precision

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the degree of exactness of a measurement

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controlled experiment

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experiment that tests only one factor at a time by using a comparison of a control group with an experimental group

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displacement

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the change in position of an object

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scalar

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a physical quantity that has magnitude but no direction

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projectile motion

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the curved path that an object follows when thrown, launched, or otherwise projected near the surface of the Earth

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accuracy

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description of how close a measurement is to the correct or accepted value of the quantity measured

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resultant

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vector that represents the sum of two or more vectors

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potential energy

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energy associated with an object because of the position, shape, or condition of the object

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equilibrium

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in physics, the state in which the net force on an object is zero

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mechanical energy

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sum of kinetic energy and all forms of potential energy

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elastic potential energy

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energy available for use when a deformed elastic object returns to its original configuration

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force

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action exerted on an object which may change the objects state of rest or motion; has magnitude and direction

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work

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change in objects energy

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static friction

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the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest

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coefficient of friction

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ration of the force of fiction between two objects in contact to the normal force with which the objects press against each other

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precision

Back 27

the degree of exactness of a measurement

Front 28

controlled experiment

Back 28

experiment that tests only one factor at a time by using a comparison of a control group with an experimental group

Front 29

displacement

Back 29

the change in position of an object

Front 30

scalar

Back 30

a physical quantity that has magnitude but no direction

Front 31

projectile motion

Back 31

the curved path that an object follows when thrown, launched, or otherwise projected near the surface of the Earth

Front 32

accuracy

Back 32

description of how close a measurement is to the correct or accepted value of the quantity measured

Front 33

resultant

Back 33

vector that represents the sum of two or more vectors

Front 34

potential energy

Back 34

energy associated with an object because of the position, shape, or condition of the object

Front 35

equilibrium

Back 35

in physics, the state in which the net force on an object is zero

Front 36

mechanical energy

Back 36

sum of kinetic energy and all forms of potential energy

Front 37

elastic potential energy

Back 37

energy available for use when a deformed elastic object returns to its original configuration

Front 38

foce

Back 38

action exerted on an object which may change the objexts state of rest or motion; has magnitude and direction

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work

Back 39

change in objects energy

Front 40

static friction

Back 40

the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest

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coefficient of friction

Back 41

ration of the force of fiction between two objects in contact to the normal force with which the objects press against each other

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momentun

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how hard it is to stop an object

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net force

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single forch whose external effects on a rigid body are the same as the effects of several actual forces acting in the body

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kinetic energy

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energy of an object that's due to the object's motion

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power

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a quantity tha tmeasures the rate at which work is done or energy is transformed

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impulse

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product of the force and the time over which the force acts on an object

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normal force

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force that acts on a surface in a direction perpendicular to the surface

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inertia

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the tendency of an object to resist being moved or,if the object is moving, to resist a change in speed or diretion

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kinetic friction

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force that opposes the movement of 2 surfaces that are in contact and are sliding over each other

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mass

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quantity of matter of an object

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energy

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indicates objects ability to change its surroundings

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weight

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force due to gravity on an objext

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newton's 1st law

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an object at rest stays at rest and an object in motion stays in motion unless acted upon

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newton's 2nd law

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F=ma

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newton's 3rd law

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if 2 objects interact the magnitude of the force exerted on object 1 by object 2 is equal to magnitude of force exerted on object 2 by object 1, and are opposite in direction

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gravitational potential energy

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potential energy stored in the gravitational fields of interacting bodies

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momentun

Back 57

how hard it is to stop an object

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net force

Back 58

single forch whose external effects on a rigid body are the same as the effects of several actual forces acting in the body

Front 59

kinetic energy

Back 59

energy of an object that's due to the object's motion

Front 60

power

Back 60

a quantity tha tmeasures the rate at which work is done or energy is transformed

Front 61

impulse

Back 61

product of the force and the time over which the force acts on an object

Front 62

normal force

Back 62

force that acts on a surface in a direction perpendicular to the surface

Front 63

inertia

Back 63

the tendency of an object to resist being moved or,if the object is moving, to resist a change in speed or diretion

Front 64

kinetic friction

Back 64

force that opposes the movement of 2 surfaces that are in contact and are sliding over each other

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mass

Back 65

quantity of matter of an object

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energy

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indicates objects ability to change its surroundings

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weight

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force due to gravity on an objext

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newton's 1st law

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an object at rest stays at rest and an object in motion stays in motion unless acted upon

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newton's 2nd law

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F=ma

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newton's 3rd law

Back 70

if 2 objects interact the magnitude of the force exerted on object 1 by object 2 is equal to magnitude of force exerted on object 2 by object 1, and are opposite in direction

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gravitational potential energy

Back 71

potential energy stored in the gravitational fields of interacting bodies