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50 Cards in this Set

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