 | Term | Definition |
| |
terminal velocity |
the greatest velocity a falling object reaches |
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Speed (formula) |
S=D/T |
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Velocity (formula) |
V=S - 9.8m/s |
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Acceleration (formula) |
A= final speed-initial speed / Time |
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Momentum (formula) |
P=m-v |
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Newton's 1a |
An object at rest will remain at rest unless acted upon by an unbalanced force |
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Newton's 1b |
An object moving at a constant velocity will remain at a constant velocity unless acted upon by an unbalanced force |
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Newton's 2 |
Acceleration depends on the object's mass and on the net force acting on the object |
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Newton's 3 |
If one object exerts a force on another object, then the second object exerts a force equal strenght in the opposite direction on the first object |
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International System of Units |
a system of measurement based on multiples of ten and on established measures of mass, length, and time |
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Meter |
the basic SI unit of length |
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Motion |
the state in which one object's distance from another is changing |
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Reference Point |
a place or object used for comparison to determine if an object is in motion |
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Speed |
the distance an object travels per unit of time |
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Average Speed |
the overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time |
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Instantaneous Speed |
the speed of an object at one instant of time |
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Velocity |
speed in a given direction |
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Slope |
the steepness of a line on a graph, equal to its vertical change divided by its horizontal change |
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acceleration |
the rate at which velocity changes |
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free fall |
the motion of a falling object when the only force acting on it is gravity. |
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net force |
the overall force on an object when all the individual forces acting on it are added together |
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friction |
the force that one surface exerts on another when the two surfaces rub against each other. |
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law of conservation of momentum |
the rule that in the absence of outside forces the total momentum of objects that interact does not change. |
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projectile |
an object that is thrown |
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air resistance |
the fluid friction experienced by objects through the air |
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force |
a push or pull exerted on an object |
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Newton |
a unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second |
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unbalanced forces |
forces that produce a nonzero net force, which changes an objects motion |
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rolling friction |
friction that occurs when an object rolls over a surface |
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fluid friction |
friction that occurs as an object moves through a fluid |
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gravity |
the force that pulls objects towards each other |
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mass |
a measure of how much matter is in an object |
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weight |
a measure of the force of gravity on an object |
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centripetal force |
a force that causes an object to move in a circle |
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momentum |
the product of an object's mass and velocity |
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inertia |
the tendency of an object to resist any change in its motion |
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satellite |
any object that orbits around another object in space |
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balanced forces |
equal forces acting on an object in opposite directions |
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sliding friction |
friction that occurs when one solid surface slides on another |
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static friction |
friction that acts on objects that are not moving |
