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20 Cards in this Set
- Front
- Back
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motion |
an object's change in position relative to a reference point
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average speed |
the total distance traveled divided by the total time taken
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velocity
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the speed of an object in a particular direction
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acceleration
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the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
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force
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a push or a pull exerted on an object in order to change the motion of the object; force has size and direction
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newton
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the SI unit for force (N)
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net force
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the combination of all of the forces acting on an object
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friction
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a force that opposes motion between two surfaces that are in contact
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gravity
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a force of attraction between objects that is due to their masses
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weight
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a measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe
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terminal velocity
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the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
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free fall
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the motion of a body when only the force of gravity is acting on the body
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projectile motion
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the curved path that an object follows when thrown, launched or otherwise projected near the surface of the Earth
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inertia
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the tendency of an object to resist being moved or if the object is moving, to resist a change in speed or direction until an outside force acts on the object
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fluid
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a non-solid state of matter in which the atoms or molecules are free to move past each other, as in a gas or a liquid
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pressure
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the amount of force exerted per unit are of a surface
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pascal
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the SI unit of pressure (Pa)
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atmospheric pressure
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the pressure caused by the weight of the atmosphere
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buoyant force
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the upward force that keeps an object immersed in or floating on a liquid
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Archimedes' Principle
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the principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces |
