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25 Cards in this Set
- Front
- Back
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a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
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model
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a set of particles or interacting components considered to be a distinct pysical entity for the purpose of study
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system
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a description of how close a measurement is to the correct or accepted value of the quantity measured
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accuracy
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the degree of exactness of a measurement
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precision
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a system for specifying the precise location of objects in the space and time
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frame of reference
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the change in position of an object
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displacement
x=xi + vi(t) + 1/2at^2 |
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the velocity of an object at some instant or at a specific point in the object's path
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instantaneous velocity
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the rate at which velocity changes over time
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v/t
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the total displacement divided by the time interval during which the displacement ocurred
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average velocity
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the motion of a body when only the force due to gravity is acting on it
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free fall
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the projections of a vector along the axes of a coordinate system
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components
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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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projectile motion
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a single force whose external effects on a rigid body are the same as the effects of several actual forces acting on the body
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net force
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the state in which the net force on an object is zero
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equilibrium
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a measure of the gravitational force exerted on an object
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weight
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a force that acts on a surface in a direction perpendicular to the surface
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normal force
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the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest
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static friction
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the force that opposes the movement of two surfaces that are in contact and are sliding over each other
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kinetic friction
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the ratio of magnitude of the force of friction between two objects in contact to the magnitude of the normal force with which the objects press against each other
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coefficient of friction
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the product of the component of a force along the direction of displacement and the magnitude of the displacement
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work w=fd
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the net work done by all the forces acting on an object is equal to the change in the object's kinetic energy
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work-kinetic energy theorem
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the energy available for use when a deformed elastic object returns to its original configuration
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elastic potential energy U = 1/2kx^2
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a parameter that is a measure of a spring's resistance to being compressed or stretched
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spring constant
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the sum of kinetic energy and all forms of potential energy
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mechanical energy
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a quantity that measures the rate at which work is done or energy is transformed
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power P = w/t
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