Forces8th vocab
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each of the black spaces below before clicking
on it to display the answer.
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Momentum | the product of an object's mass and its velocity
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formula for momentum | m=pv
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law of conservation of momentum | the total momentum of any group of objects remains the same unless outside forces also act on the objects
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Force | a push of pull that gives energy to an object
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Units of forces | forces are measured in Newtons; N
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net force | the total of all the forces acting on a object
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inertia | the tendency of matter to resist a change in its motion
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balanced forces | the net force acting on an object is zero
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unbalanced forces | the net force acting on an object is not zero
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magnitude | the amount of a measurement
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friction | a force that one surface exerts on another when the two surfaces are in contact with each other
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static friction | friction between non-moving object
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Kinetic Friction | Friction between moving objects
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Sliding Friction | friction between objects that slide (rub) against each other
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Rolling Friction | Occurs when an object rolls over a surface
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Fluid Friction | Occurs when an object moves through a fluid or a gas
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Newton's First Law of Motion | Objects at rest will stay at rest & objects in motion will stay in motion at a constant velocity unless acted on by an unbalanced force
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Newton' s Second Law of Motion | The net force acting on an object is equal to the product of the object's mass & acceleration
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Newton's Third Law of Motion | For every action force there is a reaction force that is equal, but acts in the opposite direction
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Law of Universal Gravitation | All objects in the universe are attracted to each other; strength of attraction depends on the objects' masses and distance from each other
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Freefall | The motion of an object when GRAVITY is the only force acting on it
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Terminal Velocity | Greatest velocity of a fslling object; occurs when the force of GRAVITY is EQUAL to the force of FRICTION
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Weight | A measure of the force of GRAVITY on an object
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Mass | The amount of matter in something
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Centripetal Force | The force that is pulling an object in circular motion towardss the center of the circle
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Geosynchronous Orbit | Occurs when an object orbits another object at a rate equal to the 2nd object's raate of rotation
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