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32 Cards in this Set
- Front
- Back
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difficult to analyze
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rolling friction
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friction between layers of a viscous fluid that are moving relative to one another
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fluid friction
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a component of a drag force, a force resisting the motion or a solid moving through a fluid
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skin friction
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force resisting motion between the elements making up a solid material while it undrgoes deformation
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internal friction
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effects of friction
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increases work necessary
kinetic to heat energy causes wear and tear gives difficulty in moving objects |
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ways to reduce friction
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streamlining
application of a thin film of soil/ lubrication use of ball bearing or roller bearing |
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states that friction is directlt proportional to the applied force
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amanton's first law
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states that force of friction is independent of the sliding velocity
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columb's law of friction
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greater than kinetic friction
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static friction
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proportional to the normal force pressing the surface togeher
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friction
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solids whose particles are arranged in definite patterns
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crysatlline
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do not form crystalls, their atomic arrangement is intermediate between that of disordered liquid and that of highly organized crysatlline solid
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amorphous
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tendemcy of liquids surface to behave like taut skin
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surface tension
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decrease the effects of surface tension in the water
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surfactants
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superfluids
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bose einstein condensate
fermionic condensate |
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ability of the material to undergo temporary change
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elasticity
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results from the application of force
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stress in pascal n/m^2
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4 types of stresses
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tensile
compressive shear volume |
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product of stress
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strain
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shows the direct relationship between stress and strain
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hooke's law
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is the maximum stress that will not produce permanent deformation
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elastic limit
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maximum stress thatbthe object can withstand
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ultimate strength
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ratio of the object's mass to its volume
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density
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used to obtain accurate measurements of density
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pycnometer
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ahow the load capacity of a vessel
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plimsoll lines
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allows submarines to sink or float on water
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ballast tanks
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ratio of the density of a substance and density of water
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specific gravity
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fluids at rest
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hydrostatics
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any flowing sunstance that offer little resistance to a change in its shape both liquids and gases are considered
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fluids
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pressure instruments
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mercury manometer
aneroid barometer bourdon tube pressure gauge sphygmomanometer |
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any change of pressure in an enclosed fluid at rest is transmitted undiminished to all parts of the fluid
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pascal's principle
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a body submerged in a fluid is buoyed up by a force equal in magnitude to the weight of the displaced fluid.
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archimedes' principle and bouyancy
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