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| 13520088065 | centripital acceleration | exists whenever an object moves in a circle; an acceleration directed toward the center of the circle. Linear | 0 | |
| 13520097804 | torque | occurs when a force applied to an object could cause the object to rotate. causes angular acceleration | 1 | |
| 13520121771 | Angular momentum is conserved | In any system in which the only torques acting are between objects in that system, angular momentum is conserved. any time an object, or system of objects, experiences no net torque. | 2 | |
| 13520125958 | total kinetic energy | translational kinetic energy+rotational kinetic energy | 3 | |
| 13520140734 | rotational inertia/moment of inertia | an object's resistance to a change in rotational speed. Two things affect an object's ability to resist rotational motion changes: the object's mass and how far away that mass is from the center of rotation. | 4 | |
| 13520149037 | The lever arm for a force | the closest distance from the fulcrum, pivot, or axis of rotation to the line on which that force acts. d ⊥ |  | 5 |
| 13520408752 | fulcrum | the point about which an object rotates, or could rotate. | 6 | |
| 13520573267 | Rotational speed | how fast the object rotates—that is, how many degrees or radians it rotates through per second. | 7 | |
| 13520576267 | rotational/angular acceleration | occurs when a rigid object is free to rotate about a fixed axis and has a net external torque acting on it. | 8 | |
| 13525041025 | linear acceleration is caused | a net force | 9 | |
| 13525045407 | angular acceleration is caused by | a net torque | 10 | |
| 13535450700 | area under a torque versus time graph gives | the change in an object's angular momentum. | 11 | |
| 13535456359 | the area under a force versus time graph gives | the change in an object's linear momentum, impulse | 12 | |
| 13594677029 | Frame of reference | a system for specifying the precise location of objects in space and time | 13 | |
| 13594680158 | inertial frame of reference | a coordinate system that is not accelerating; all forces acting in an inertial frame of reference are real forces, as opposed to fictitious forces that are observed due to an accelerating frame of reference | 14 | |
| 13594684167 | origin | A fixed point from which coordinates are measured. | 15 | |
| 13594686846 | vector | A quantity that has magnitude and direction | 16 | |
| 13594686847 | scalar | A physical quantity that has magnitude only. | 17 | |
| 13594691669 | Resultant | the sum of two or more vectors | 18 | |
| 13594696217 | concurrent vectors | When two or more vectors act simultaneously upon the same point | 19 | |
| 13594699995 | polar coordinate system | A two-dimensional coordinate system in which each point on a plane is determined by a distance from a reference point and an angle from a reference direction. | 20 | |
| 13595308386 | position | (x ) tells where the object is on the track. | 21 | |
| 13595312464 | speed | (v ) tells how fast the object is moving. | 22 | |
| 13595316116 | Acceleration (a) | how much the object's velocity (magnitude or direction) changes in one second. When an object speeds up, its acceleration is in the direction of its motion; when an object slows down, its acceleration is opposite the direction of its motion. | 23 | |
| 13595321574 | Displacement (Δx ) | tells how far the object ends up away from its starting point, regardless of any motion in between starting and ending positions. | 24 | |
| 13595325200 | position-time graphs | the slope is the object's speed, and the object's position is read from the vertical axis. | 25 | |
| 13595326724 | velocity-time graphs | the speed is read from the vertical axis, and the slope is the object's acceleration. | 26 | |
| 13595331210 | The five principal motion variables | v 0 initial velocity v f final velocity Δx displacement a acceleration t time | 27 | |
| 13595343236 | In any case of accelerated motion, when three of the five principal motion variables are known, | the remaining variables can be solved for using the kinematic equations. | 28 | |
| 13595346125 | Free fall | no forces other than the object's weight are acting on the object. | 29 | |
| 13595348208 | projectile | an object in free fall, but it isn't falling in a straight vertical line. To approach a projectile problem, make two motion charts: one for vertical motion and one for horizontal motion. | 30 | |
| 13595387673 | motion analysis | to describe, calculate, and predict where an object is, how fast it's moving, and how much its speed is changing. In this chapter you'll review two separate approaches to make these predictions and descriptions: graphs and algebra. | 31 | |
| 13595393112 | force | a push or a pull applied by one object and experienced by another object. | 32 | |
| 13595403052 | The net force | the single force that could replace all the individual forces acting on an object and produce the same effect. Forces acting in the same direction add together to determine ______; forces acting in opposite directions subtract to determine _______. | 33 | |
| 13595409995 | Weight | the force of a planet on an object near that planet. | 34 | |
| 13595412873 | force of friction | the force of a surface on an object; acts parallel to the surface. | 35 | |
| 13595416591 | Kinetic friction | the friction force when something is moving along the surface and acts opposite the direction of motion. | 36 | |
| 13595421495 | static friction | is the friction force between two surfaces that aren't moving relative to one another. | 37 | |
| 13595424509 | The normal force | the force of a surface on an object; acts perpendicular to the surface. | 38 | |
| 13595427905 | coefficient of friction | a number that tells how sticky two surfaces are. | 39 | |
| 13595429949 | Newton's third law | the force of Object A on Object B is equal in amount and opposite in direction to the force of Object B on Object A. | 40 | |
| 13595432549 | Newton's second law | an object's acceleration is the net force it experiences divided by its mass, and is in the direction of the net force. | 41 | |
| 13595441030 | A moving object's momentum | its mass times its velocity; ____ is in the direction of motion. | 42 | |
| 13595445839 | Impulse | a force multiplied by the time during which that force acts. The net impulse on an object is equal to the change in that object's momentum. | 43 | |
| 13595448550 | system | made up of several objects that can be treated as a single thing. It's important to define the _______ you are considering before you treat a set of objects as a system. | 44 | |
| 13595455880 | kinetic energy is conserved only in | elastic collision | 45 | |
| 13595460546 | total momentum is conserved in | all collisions | 46 | |
| 13595467541 | Whenever you see a collision, the techniques of ______ are most likely to be useful. Try ______ first, before trying to use force or energy approaches. | impulse and momentum | 47 | |
| 13595475438 | An object possesses kinetic energy by | moving | 48 | |
| 13595478621 | Interactions with other objects can create | potential energy. | 49 | |
| 13595481438 | Work | when a force acts over a distance parallel to that force. | 50 | |
| 13595485526 | kinetic energy can change. | When work is done on an object (or on a system of objects) | 51 | |
| 13595487400 | Kinetic Energy | is possessed by any moving object. It comes in two forms | 52 | |
| 13595490123 | Translational Kinetic Energy | It exists when an object's center of mass is moving. |  | 53 |
| 13595492040 | Rotational Kinetic Energy | It exists when an object rotates. |  | 54 |
| 13595495917 | Gravitational potential energy near a planet | energy stored in a gravitational field. h is the vertical height above a reference position. |  | 55 |
| 13595501852 | Gravitational potential energy a long way from a planet, the formula is | GPE=-GM1M2/D, d is measured from the planet's center. | 56 | |
| 13595526001 | Elastic potential energy/ spring potential energy | energy stored by a spring |  | 57 |
| 13595532740 | Internal energy of a two-object system is just another way of saying | potential energy | 58 | |
| 13595535538 | Mechanical Energy | sum of the potential energy and kinetic energy in a system | 59 | |
| 13595539314 | Work is done when | a force acts on something that moves a distance parallel to that force. | 60 | |
| 13595541024 | Power | energy used per second, or work done per second. | 61 | |
| 13595546411 | rotational inertia | an object's resistance to a change in rotational speed. depends on mass as well as on the distribution of that mass. | 62 | |
| 13595549219 | mass | describes an object's resistance to a change in speed | 63 | |
| 13595560669 | gravitational field g near a planet | how much 1 kg of mass weighs at a location. Near Earth's surface, the gravitational field is 10 N/kg. | 64 | |
| 13595563771 | gravitational force | the planet's gravitational field is mg , where m is the mass of the object experiencing the force. the weakest of the fundamental forces in nature. | 65 | |
| 13595566090 | Newton's gravitation constant | G = 6 × 10−11 N·m2 /kg2 . | 66 | |
| 13595569093 | free-fall acceleration (sometimes imprecisely called the acceleration due to gravity) | is equal to the gravitational field near that planet. | 67 | |
| 13595588651 | Coulomb's law | the force of one charged particle on another is: |  | 68 |
| 13595594376 | Electric charge (Q ) | exists due to excess or deficient electrons on an object; it comes in two kinds: positive and negative. The unit is the coulomb . | 69 | |
| 13595601108 | Electric current (I ) | the flow of (positive) charge per second. The units are amperes. | 70 | |
| 13595604503 | One ampere means | one coulomb of charge flowing per second. | 71 | |
| 13595607092 | Resistance (R) | measured in ohms (Ω), tells how difficult it is for charge to flow through a circuit element. | 72 | |
| 13595610079 | Resistivity (ρ ) | is a property of a material, which implies what the resistance would be of a meter-cube bit of that material. | 73 | |
| 13595611799 | Voltage | electrical potential energy per coulomb of charge. | 74 | |
| 13595615219 | series | Resistors are connected in _____ if they are connected in a single path. | 75 | |
| 13595621625 | parallel | Resistors are connected in _____ if the path for current divides, then comes immediately back together. | 76 | |
| 13595796625 | period | the time for one cycle of simple harmonic motion, or the time for a full wavelength to pass a position. | 77 | |
| 13595797936 | frequency | the number of cycles, or the number of wavelengths passing a position, in one second. | 78 | |
| 13595800407 | unit of frequency | the Hz, which means "per second." | 79 | |
| 13595802949 | amplitude | the distance from the midpoint of a wave to its crest, or the distance from the midpoint of simple harmonic motion to the maximum displacement. | 80 | |
| 13595804450 | wavelength | measured from peak to peak, or between any successive identical points on a wave. | 81 | |
| 13595807219 | spring constant k | measured in units of newtons per meter (N/m), is related to the stiffness of a spring. | 82 | |
| 13595808695 | restoring force | any force that always pushes an object toward an equilibrium position. | 83 | |
| 13595811000 | Nodes | the stationary points on a standing wave. | 84 | |
| 13595812835 | Antinodes | the positions on standing waves with the largest amplitudes. | 85 | |
| 13610408370 | Kinematics | description of motion | 86 | |
| 13652397050 | When there is a constant angular velocity, what else exists? | tangential velocity centripetal acceleration- there is a change in direction of velocity | 87 | |
| 13652403629 | When there is a angular acceleration, what else exists? | 88 |
