Term
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Definition
| the rate of change of velocity |
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Definition
| the length of path between two points |
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Term
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Definition
| the speed at which an object is moving at a given moment in time |
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Term
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Definition
| movement in relation to a frame of reference |
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Term
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Definition
| a quantity that has a direction associated with it |
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Term
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Definition
| the total distance travelled divided by the total time it takes to travel that distance |
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Term
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Definition
| a system of objects that are not moving with respect to one another |
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Term
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Definition
| a graph in which the displayed data form a straight line |
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Term
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Definition
| the vector sum of two or more vectors |
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Term
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Definition
| the speed and direction an object is moving measured relative to a reference point |
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Term
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Definition
| a steady change in velocity |
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Term
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Definition
| the movement of an object toward earth because of gravity |
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Term
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Definition
| a graph in which the displayed data do not form a straight line |
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Term
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Definition
| the ratio of the distance an object moves divided by the time it takes to move that distance |
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Term
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Definition
| fluid friction acting on an object moving through the air |
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Term
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Definition
| a push or pull that acts on an object |
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Term
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Definition
| the attraction between any two objects because of their masses |
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Term
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Definition
| the overall force acting on an object after all forces are combined |
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Term
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Definition
| the powerful attractive force that binds protons and neutrons together in a nucleus |
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Term
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Definition
| the force of gravity acting on an object |
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Term
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Definition
| a force that continuously changes the direction of an object to make it move in a circle |
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Term
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Definition
| a force that opposes the motion of objects that touch as they move past each other |
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Term
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Definition
| the tendancy of an object to resist a change in its motion |
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Term
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Definition
| the SI unit of force. Equal to the force required to accelerate a 1 kg mass at a rate of 1 m/s2 |
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Term
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Definition
| the constant velocity of a falling object when the force of air resistance equals the force of gravity |
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Term
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Definition
| a force associated with charged particles, which has two aspects, electric force and magnetic force |
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Term
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Definition
| the attractive force that acts between any two objects |
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Term
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Definition
| the amount of matter in an object |
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Term
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Definition
| the curved path of an object in motion after it has been given an initial forward velocity |
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Term
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Definition
| a powerful attractive force that acts over a short range |
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Term
| What is needed to describe motion completely? |
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Definition
| To describe motion accurately and completely, a frame of reference is necessary |
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Term
| How are distance and displacement different? |
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Definition
| Displacement infers straight line travel between the two points. Distance is the actual length of te path traveled, straight or curved. |
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Term
| How do you add displacements? |
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Definition
| Add displacements using vector addition. |
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Term
| How are instantaneous speed and average speed different? |
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Definition
| Average speed is computed for the entire duration of a trip, and instantaneous speed is measured at a particular instant. |
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Term
| How can you find te speed from a distance-time graph? |
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Definition
| The slope of the line on a distance time graph is speed. |
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Term
| How are speed and velocity different? |
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Definition
| Velocity is a description of both speed and direction of motion. Velocity is a vector. |
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Term
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Definition
| Two or more velocities add by vector addition. |
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Term
| How are changes in velocity described? |
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Definition
| Acceleration can be described as changes in speed, changes in direction, or changes in both. Acceleration is a vector. |
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Term
| How can you calculate acceleration? |
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Definition
| You can calculate acceleration for straight line motion by dividing the change in velocity by the total time. |
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Term
| How does a speed time graph indicate acceleration? |
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Definition
| The slope of a speed time graph is acceleration. |
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Term
| What is instantaneous acceleration? |
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Definition
| How fast velocity of an object is changing at a given instant. |
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Term
| How do forces affect the motion of an object? |
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Definition
| A force can cause a resting object to move, or it can accelerate a moving object by changing te object's speed or direction |
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Term
| What are the 4 main types of friction? |
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Definition
| Static, sliding, rolling, and fluid |
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Term
| How do gravity and air resistance affect a falling object? |
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Definition
| Gravity causes objects to accelerate downward whereas air resistance acts in the direction opposite to the motion and reduces acceleration. |
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Term
| In what direction does the Earth's gravity act |
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Definition
| Downward toward the center of the earth |
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Term
| Why does a projectile follow a curved path? |
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Definition
| The combination of an initial forward velocity and the downward vertical force of gravity causes theball to follow a curved path. |
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Term
| How does Newton's first law relate change in motion to a zero net force? |
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Definition
| According to Newton's 1st law of motion, the state of motion of an object does not change as long as the net force acting on the object is zero. |
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Term
| How does Newton's second law of motion relate force, mass, and acceleration |
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Definition
| The acceleration of an object is equal to the net force acting on it divided by the object's mass. |
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Term
| How are weight and mass related? |
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Definition
| Mass is a measure of inertia of an object. Weight is a measure of the force of gravity acting on an object. |
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Term
| How are weight and mass related? |
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Definition
| Mass is a measure of inertia of an object. Weight is a measure of the force of gravity acting on an object. |
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Term
| What forces can attract and repel? |
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Definition
| Electric force and magnetic force are the only forces that can both attract and repel. |
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Term
| What force holds the nucleus together? |
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Definition
| Two forces, the strong nuclear force and the weak nuclear force, act within the nucleus to hold it together |
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Term
| What is Newton's law of universal gravitation? |
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Definition
| Newton's law of universal gravitation states that every object in the universe attracts every other object. |
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