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29 Cards in this Set
- Front
- Back
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Motion |
The process of changing position |
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Reference point |
The starting point you use to describe the motion or position of an object |
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Position |
A objects distance and direction from a reference point |
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Displacement |
The difference between the initial, or starting position and the final position of an object that has moved |
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Speed |
The distance an object moves divided by the time it takes to move that distance |
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Constant Speed |
The rate of change of position in which the same distance is traveled each second |
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Instantaneous speed |
An objects speed at a specific instant in time |
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Average speed |
The total distance traveled divided by the time taken to travel that distance. |
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Velocity |
The speed and direction of a moving object |
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Acceleration |
A measure of the change in velocity during a period of time |
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Force |
A push or pull on an object |
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Contact force |
A push or pull on an object by another object that is touching it |
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Noncontact force |
A push or pull that one object applies to another without touching it |
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Gravity |
An attractive force that exists between all objects that have mass |
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Mass |
A measure of the amount of matter in an object |
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Weight |
A measure of the force of gravity acting upon an object |
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Friction |
A force that limits motion |
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Net Force |
the combination of all forces acting on an object |
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Balanced forces |
forces on an object that combine on an object to form a net force of zero |
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unbalanced forces |
forces on an object that combine on an object to form a net force that is not zero |
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Newton's first law of motion |
if the net force acting on an object is zero, then the motion will stay the same |
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Inertia |
The tendency of an object to resist a change in its motion |
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Newtons second law of motion |
the acceleration of an object is equal to the net force divided by the mass |
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Circular motion |
motion in which an object is moving long a curved path
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Centripedal Force |
a force that acts perpendicular to the direction of the motion. |
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Momentum |
a measure of how hard it is to stop a moving object |
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Law of conservation of momentum |
the total momentum of a group stays the same unless acted on by outside forces. |
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Newtons third law of motion |
For every action, there is an equal and opposite reaction. |
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Force Pair |
the forces two objects apply to each other. |
