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Force and motion
Term | Definition |
---|---|
Position | Location of an object |
Motion | An objects change of position relative to a reference point |
Reference point | A place or object to which another location is compared |
Displacement | The distance of a straight line from the starting point to the ending point |
Speed | The measure of how quickly an object moves over time Distance/Time |
Average speed | Total distance traveled divided by the total time of travel |
Instantaneous speed | The speed of an object at a specific moment in time |
Velocity | An object's speed combined with its direction of motion |
Vector | A physical quantity of size and direction |
Acceleration | The measure of of how quickly velocity changes |
Inertia | A tendency to do nothing or to remain unchanged. |
Friction | The resistance that one surface or object encounters when moving over another. |
Newton's First Law | An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. |
Force | Strength or energy as an attribute of physical action or movement. |
Newton's Second Law | The acceleration of an object depends on the mass of an object and the net force applied F=ma |
Net Force | The combonation of all the forces acting upon an object |
Balanced Force | A set of forces that cancel each other so there is no overall force being applied |
Unbalanced Force | A set of forces that do not cancel each other. This results in motion. |
Potential Energy | The energy of position |
Kinetic Energy | The energy of motion |
Newton's Third Law | For every action there is an equal and opposite reaction of the force applied |