forces vocab
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each of the black spaces below before clicking
on it to display the answer.
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net force | the sum of all the forces acting upon an object.
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momentum | The quantity of motion of a moving body, measured as a product of its mass and velocity.
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formula of momentum | p=mv
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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 | push or pull.
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units of force | forces are measured in newtons
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Inertia | A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force
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Balanced force | net force acting on an object is zero
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Unbalanced force | forces that produce a non-zero net force
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Magnitude | the amount of a measurement.
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Friction | The resistance that one surface or object encounters when moving over another.
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static friction | friction between nonmoving objects
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kinetic friction | friction between moving objects
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sliding friction | friction between objects that slide
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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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Newtons First Law of Motion | In the absence of a net force, an object will continue with its present velocity. If it is at rest, it will stay at rest. If it is moving, it will maintain its velocity
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Newtons second law of motion | the rate of change of momentum is proportional to the imposed force and goes in the direction of the force
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Newtons third law of motion | every action force has an equal reaction force
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Law of universal gravitation | every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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free fall | motion of an object when only gravity is acting on it
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terminal velocity | constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration
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weight | The force exerted on the mass of a body by a gravitational field
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mass | quantity of matter that a body contains
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centripetal force | force that acts on a body moving in a circular path and is directed toward the center around which the body is moving
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geosynchronous orbit | occurs when an object orbits another object at a rate equal to the 2nd objects rate of rotation.
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