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PointApprox (Copy) |
An object can be assumed to be a point particle when its dimensions are very small relative to its distance from other objects. |
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PointApprox (Copy) (Copy) |
An object can be assumed to be a point particle when its dimensions are very small relative to its distance from other objects. |
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Position |
A position is a point in space. |
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Position (Copy) |
A position is a point in space. |
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Position (Copy) |
A position is a point in space. |
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PositionMap |
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PositionMap (Copy) |
TBD |
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PositionTable |
A position table shows the position of an object along a path at equal successive times (clock readings). |
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PositionTable (Copy) |
A position table shows the position of an object along a path at equal successive times (clock readings). |
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PositionTable (Copy) (Copy) |
A position table shows the position of an object along a path at equal successive times (clock readings). |
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PosMagUnit |
The SI unit for the magnitude of the position vector is the meter, $\mathrm{m}$. |
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PosMagUnit (Copy) |
The SI unit for the magnitude of the position vector is the meter, $\mathrm{m}$. |
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PosNegAccelSuccessiveDistance |
An object moving in one direction and having positive(negative) acceleration, in successive equal time intervals, will travel successively greater(lesser) distances. |
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PosNegAccelSuccessiveDistance (Copy) |
An object moving in one direction and having positive(negative) acceleration, in successive equal time intervals, will travel successively greater(lesser) distances. |
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PosSlopeIsVel |
For motion in one dimension, the slope of the tangent to the graph of position v. time at a particular time (clock reading) is the instantaneous velocity at that time. |
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PosSlopeIsVel (Copy) |
For motion in one dimension, the slope of the tangent to the graph of position v. time at a particular time (clock reading) is the instantaneous velocity at that time. |
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PosSlopeIsVel (Copy) (Copy) |
For motion in one dimension, the slope of the tangent to the graph of position v. time at a particular time (clock reading) is the instantaneous velocity at that time. |
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PosVelIncreasingPos |
The value of the position, on a particular axis, of an object having a positive velocity along that axis during a time interval will be greater at the end of the interval than at the beginning. |
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PosVelIncreasingPos (Copy) |
The value of the position, on a particular axis, of an object having a positive velocity along that axis during a time interval will be greater at the end of the interval than at the beginning. |
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PosVelIncreasingPos (Copy) (Copy) |
The value of the position, on a particular axis, of an object having a positive velocity along that axis during a time interval will be greater at the end of the interval than at the beginning. |
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PosvTimeDiagToVel |
On a position–time graph, a straight line with positive slope represents motion at a constant positive velocity. This corresponds to a horizontal, positive‑valued segment on a velocity–time graph.
On a position-time graph, a straight line with negative slope represents motion at a constant negative velocity. This corresponds to a horizontal, negative‑valued segment on a velocity–time graph. |
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PosvTimeDiagToVel (Copy) |
On a position–time graph, a straight line with positive slope represents motion at a constant positive velocity. This corresponds to a horizontal, positive‑valued segment on a velocity–time graph.
On a position-time graph, a straight line with negative slope represents motion at a constant negative velocity. This corresponds to a horizontal, negative‑valued segment on a velocity–time graph. |
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PosvTimeDiagToVel (Copy) (Copy) |
On a position–time graph, a straight line with positive slope represents motion at a constant positive velocity. This corresponds to a horizontal, positive‑valued segment on a velocity–time graph.
On a position-time graph, a straight line with negative slope represents motion at a constant negative velocity. This corresponds to a horizontal, negative‑valued segment on a velocity–time graph. |
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PosvTimeFlatToVel |
On a position–time graph, a straight line with zero slope (a horizontal line) represents no change in position, i.e. zero velocity. This corresponds to a horizontal segment at zero on a velocity–time graph. |
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PosvTimeParabolaToAccel |
On a position–time graph, a parabolic segment that is concave up represents motion with a constant, positive acceleration. This corresponds to a horizontal, positive‑valued segment on an acceleration–time graph.
On a position–time graph, a parabolic segment that is concave down represents motion with a constant, negative acceleration. This corresponds to a horizontal, negative‑valued segment on an acceleration–time graph. |
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PosvTimeParabolaToVel |
On a position–time graph, a parabolic segment that is concave up represents motion with a constant, positive rate of change of velocity. This corresponds to a straight, positive-sloped line on a velocity–time graph.
On a position–time graph, a parabolic segment that is concave down represents motion with a constant, negative rate of change of velocity. This corresponds to a straight, negative-sloped line on a velocity–time graph. |
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PosvTimeStraightToAccel |
On a position–time graph, a straight line having either positive, negative, or zero slope represents motion with zero acceleration. This corresponds to a horizontal segment at zero on an acceleration–time graph. |
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Precision |
The precision of a set of measurements is the spread of the measurements. |
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Prediction |
A prediction is an assertion (claim) about what might happen under certain conditions concerning a natural phenomenon or the results of a planned investigation. |
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PrincipalRaysName |
The principal rays are the parallel ray, the central ray, the focal ray, and for a spherical mirror, the center of curvature ray. |
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PrincipalRaysName (Copy) |
The principal rays are the parallel ray, the central ray, the focal ray, and for a spherical mirror, the center of curvature ray. |
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PrincipalRaysUses |
Any two principal rays determine the image. |
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PrincipalRaysUses (Copy) |
Any two principal rays determine the image. |
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PrismsRaindrops |
Prisms and raindrops separate light into colors. |
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ProjectileMotion |
Projectile motion is motion under the influence of only Earth's gravitational acceleration $g$, which is assumed constant in magnitude and direction. This means that the motion must be near Earth's surface, over distances that are small relative to Earth's radius, and air resistance and other forces are assumed to be negligible. |
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ProtonCharge |
The proton charge is $e$, the elementary charge. |
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ProtonMass |
The proton mass, $m_\mathrm{p}$, is $1.67 \times 10^{-27} \, \mathrm{kg}$. |
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RealImage |
A real image is an image that is formed by light rays and can be viewed on a screen. |
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ReferenceFrame |
Definition TBD |
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ReferenceFrame (Copy) |
Definition TBD |
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Reflection |
Reflection is when light bounces off an object. |
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Refraction |
Refraction is when light changes direction as it enters a different medium. |
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RefractionDirection |
Light bends toward(away from) the normal to the interface between the two media when it enters a medium in which light travels slower(faster). |
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RefractionDirection (Copy) |
Light bends toward(away from) the normal to the interface between the two media when it enters a medium in which light travels slower(faster). |
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RigidBodyMechanics |
Rigid body mechanics is the branch of mechanics that studies the motion and equilibrium of solid objects that do not deform under applied forces. |
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RigidBodyMechanics (Copy) |
Rigid body mechanics is the branch of mechanics that studies the motion and equilibrium of solid objects that do not deform under applied forces. |
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RopeForceDirection |
The direction of the force exerted by a rope on an object is along the rope and away from the object. |
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RoughReflection |
Objects that are not mirrors reflect light in all directions. |
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RubbingCharge |
A few electrons can be transferred from some macroscopic objects to others by rubbing the objects together. |
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SameForceMoreMassLessAccel |
When equal net forces act on objects having different masses, the acceleration of the more massive object will be less than the acceleration of the less massive object. |
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