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50 Cards in this Set
- Front
- Back
Force Equation
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Mass*acceleration
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Force
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push or pull that causes a change in shape or motion
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weight
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measurement of gravity times mass
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gravity on earth
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9.8 meters/second
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torque
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force-like quantity in rotational mechanical systems
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calculating torque
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multiplying the force applied to the length of the lever arm (circle radius)
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Density
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mass times volume
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waters density
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one, used as the standard for measuring density
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two types of fluids
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hydraulic(liquids) pneumatic(gas)
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gasses
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compressible
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liquids
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Incompressible
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absolute pressure
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measure in reference to a vacuum (zero pressure)
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gauge pressure
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measured relative to atmospheric pressure (14.7 psi)
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total pressure
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gauge pressure plus atmospheric pressure
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weight density
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ratio of an object's weight to its volume
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weight density of water
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62.4 pounds per cubic foot
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voltage
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comes in two forms- direct current/ alternating current
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voltmeters
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measure volt difference
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anode
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positive electrode of a battery
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cathode
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negative electrode of a battery
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temperature difference
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acts as a prime mover in thermal systems because heat always moves from warmer regions to cooler regions
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heat
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form of energy characterized by vibrating movement of atoms and molecules
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work
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force times distance
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input work
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work going in a system
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output work
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work done by the system
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efficiency
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output work divided by input work, multiplied by 100
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rotational mechanical systems
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work is equal to the torque multiplied by the angle through which the lever arm moves
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one radian
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57.3 degrees
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linear mechanical work
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performed when a mass is moved in a straight line
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angular mechanical work
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performed when a mass is moved around an axis or rotaion
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mechanical work
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causes an object to start moving, stop moving, or change direction
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closed fluid system
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fluids are reused
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cross-sectional area of a cylinder
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can be found by multiplying .7854 by the diameter
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basic unit of electrical work
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joule
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joule
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volt*coulomb
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rate
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displacement-like quantity divided by elapsed time
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velocity
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measure of linear mechanical work
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speed
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similar to velocity, but scalar (no speed or direction)
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one revolution
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6.28 radians in 360 degrees
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acceleration
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rate at which speed increases or decreases
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viscocity
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quality of a substance related to its thickness
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electrical rate
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amount of charge moved in a given period of time
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hertz
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measure of frequency in alternating current
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drag resistance
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the disruption of air as an object moves
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sliding friction
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must be overcome to stop an object in motion
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kinetic friction
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must be overcome to keep an object in motion
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ohm's law
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voltage equals current times resistance
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conductors
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allow free flow of electrons
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inductors
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do not allow free flow of electrons
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energy
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ability to do work
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