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Label Description LG Status Operations
Displacement A displacement is a vector whose length is the shortest distance from an initial to a final position. The SI unit for the magnitude of displacement is the meter, $\mathrm{m}$. 1 Ready Edit
Distance The distance between two points in physical space is the length of a straight line between them. The SI unit for distance is the meter, $\mathrm{m}$. 0 Ready Edit
DistanceTraveled The distance traveled is the length of a specific path between two points. The SI unit for distance traveled is the meter, $\mathrm{m}$. 1 Ready Edit
DivergingLensFocalRay For a diverging lens, the focal ray originates at the object, travels toward the back focus, passes through the lens, and changes direction to travel parallel to the lens axis. 0 Ready Edit
DivergingLensMirrorImage The image formed by a diverging lens or mirror is virtual, upright, and smaller than the object. 0 Ready Edit
DivergingLensParallelRay For a diverging lens, the parallel ray originates at the object, travels parallel to the lens axis, passes through the lens, and changes direction to appear to originate from the front focus. 0 Ready Edit
DivergingMirrorFocalRay For a diverging mirror, the focal ray originates at the object, travels toward the back focus, is reflected, and travels parallel to the mirror axis. 0 Ready Edit
DivergingMirrorParallelRay For a diverging mirror, the parallel ray originates at the object, travels parallel to the mirror axis, is reflected, and changes direction to appear to originate from the back focus. 0 Ready Edit
Duration A duration is the magnitude of a time interval or time period. The SI unit of duration is the second, $\mathrm{s}$. 2 Ready Edit
EarthMass Earth's mass is approximately $5.97 \times 10^{24}$ kg. 0 Ready Edit
EarthRadius Earth's radius is approximately $6.4 \times 10^{6}$ m. 0 Ready Edit
EarthSunDistance The distance from Earth to the Sun is approximately $1.5 \times 10^{8}$ km. 0 Ready Edit
EarthSurfaceGravAccel Near Earth's surface, the magnitude of the gravitational acceleration, $g$, is approximately $9.8 \, \mathrm{m/s}^2$. 1 Ready Edit
EarthSurfaceGravDir Over a sufficiently small area of Earth's surface, the direction of Earth's gravitational acceleration can be approximated as constant, and defines "down". 1 Ready Edit
EarthSurfaceGravForceMag Near Earth's surface, the magnitude of Earth's gravitational force on an object is $F_\text{g}=m g$, where $m$ is the mass of the object, in kilograms, and $g=9.8 \, \mathrm{m/s}^2$. 1 Ready Edit
ElectricCharge Electric charge is a property of some particles. There are two types of electric charge, positive and negative. A particle with no charge is neutral. 0 Ready Edit
ElectronCharge The electron charge is $-e$, where $e$ is the elementary charge unit. 0 Ready Edit
ElectronMass The electron mass, $m_\text{e}$, is $9.11 \times 10^{-31} \, \mathrm{kg}$. 0 Ready Edit
ElectrostaticDirection The direction of the electrostatic force of object A on object B is along the line between the two objects. The direction is toward object A if the objects have charges of opposite sign and away from object A if the objects have charges of the same sign. 0 Ready Edit
ElectrostaticEquation The magnitude of the electrostatic force of object A on object B is $F_\text{AB}=k \frac{q_\text{A} q_\text{B}}{d^2}$, where $q_\text{A}$ and $q_\text{B}$ are the charges of objects A and B, in coulombs (C), respectively, $d$ is the distance between the two charges in meters (m), and the constant $k=9.0 \times 10^{9} \, \mathrm{N \cdot m}^2/\mathrm{C}^2$. 0 Ready Edit
ElectrostaticStrengthCharge The magnitude of the electrostatic force of one object on another object is proportional to the charge of each of the objects. 0 Ready Edit
ElectrostaticStrengthDistance The magnitude of the electrostatic force between two objects is proportional to the inverse square of the distance between the objects. 1 Ready Edit
ElementaryCharge The elementary charge, $e$, is the charge on a proton. Its magnitude is $1.602 \times 10^{-19} \, \mathrm{C}$. 0 Ready Edit
EnergyConserved Energy is conserved. 0 Ready Edit
EuclideanVector A Euclidean vector is a geometric object that has magnitude and direction. 0 Ready Edit
Evidence Evidence is data that have been represented, analyzed, and interpreted in the context of a specific scientific question. 0 Ready Edit
Factorial The factorial of a number $n$, $n!$, is $n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1$. 0 Ready Edit
FluidResistance Fluid resistance is the force exerted on an object by a fluid because of the object is moving through the fluid. 0 Ready Edit
FluidResistanceDirection The direction of the force of fluid resistance on an object is opposite to the object's motion through the fluid. 0 Ready Edit
FluidResistanceStrength The strength of the force of fluid resistance on an object is often modeled as $F=C v^x$ where $C$ is a constant that depends on the object and the fluid, $v$ is the speed of the object relative to the fluid, and the value of $x$ is usually 1, 2, or some number in between. 0 Ready Edit
FocalLength An optical element's focal length is the distance from the center of the element to the focus. For a converging(diverging) element the distance is defined to be positive(negative). 0 Ready Edit
Focus An optical element's focus is the point that incoming paraxial light rays converge to or seem to diverge from. 0 Ready Edit
Force A force is a push or a pull that accelerates an object. Forces have magnitude (strength) and direction. The SI unit for the magnitude of force is the newton, $\mathrm{N}$. $1 \, \mathrm{N} = 1 \, \mathrm{kg \cdot m/s}^2$. 0 Ready Edit
Force-delta-v A force is a push or a pull, applied for a duration, that changes an object's velocity. The SI unit for the magnitude of force is the newton, $\mathrm{N}$. $1 \, \mathrm{N} = 1 \, \mathrm{kg \cdot m/s}^2$. 0 Ready Edit
Force-PushorPull A force is a push or a pull. Forces have strength and direction. 0 Ready Edit
GPEEqnUnits The equation for gravitational potential energy relative to a reference point is $\text{GPE}=m g h$, where $\text{GPE}$ is the object's gravitational potential energy, in joules, $m$ is the object's mass, in kilograms, $g$ is the acceleration due to gravity, in meters per second squared, and $h$ is the object's height above the reference point, in meters. 0 Ready Edit
GravitationalPotentialEnergy Gravitational potential energy is the energy that an object has because of its position in a gravitational field. 0 Ready Edit
GravityDirection The direction of the gravitational force exerted on object 1 by object 2 is towards object 2. 0 Ready Edit
GravityEquation The magnitude of the gravitational force $F_\text{g}$ of object A on object B is $F_\text{g}=G \frac{m_\text{A} m_\text{B}}{d^2}$ where $G = 6.67 \times 10^{-11} \, \mathrm{N \cdot m}^2/\mathrm{kg}^2$ is the universal gravitational constant, $m_\text{A}$ and $m_\text{B}$ are the masses of the two objects, in kilograms and $d$ is the distance between them, in meters. 1 Ready Edit
GravityExists A gravitational interaction exists between any two objects having mass. 0 Ready Edit
GravitySpherePoint The gravitational force exerted by an extended, spherically-symmetric object is identical to the force exerted by a point particle, of the same mass, located at the center of the object. 0 Ready Edit
GravityStrengthDistance The strength of the gravitational force of one object on another object is proportional to the inverse square of the distance between the objects. 0 Ready Edit
GravityStrengthMass The strength of the gravitational force of one object on another object is directly proportional to the mass of each of the objects. 0 Ready Edit
GravityWeak The force of gravity is so weak that unless at least one of the objects is very large, it can be ignored. 0 Ready Edit
GreaterDurationGreaterVelChange Given equal net forces exerted on two objects having equal masses, the object experiencing the net force for the greater duration will have the greater change of velocity. 1 Ready Edit
GreaterForceGreaterVelChange Given net forces exerted for the same duration on two objects having equal masses, the object experiencing the greater net force will have a greater change in velocity. 0 Ready Edit
GreaterMassLesserVelChange Given equal net forces acting on two objects for the same duration, the less-massive object will experience the greater change of velocity. 0 Ready Edit
GreaterSpeedGreaterDist In equal time intervals, an object with a greater speed will travel a greater distance than an object with a lesser speed. 1 Ready Edit
HookesLawSpring A Hooke's Law spring is a spring for which the restoring force is linearly proportional to, and in the opposite direction from, the displacement from its equilibrium position, i.e. $F =-k \Delta x$, where $F$ is the restoring force, in newtons, $k$ is the spring constant, in newtons per meter, and $\Delta x=\left(x-x_0\right)$ is the displacement, in meters, from the spring's current extension, $x$, to its equilibrium extension, $x_0$. 0 Ready Edit
Hypothesis A hypothesis is a type of testable explanation (model) of natural systems or phenomena, or of evidence from an investigation. 0 Ready Edit
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