Engineering Systems Misoc

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lever
A rigid object which is used in contact with a pivot (fulcrum) to multiply the effort (force) applied to another object
physical principle of a lever
conserve momentum
class 1 lever
Fulcrum between load and applied force
class 2 lever
Load between applied force and fulcrum
class 3 lever
Applied force between load and fulcrum
wheel and axle
modified lever of the first class that rotates in a circle around a center point or fulcrum
inclined plane
a flat surface with one end higher than the other
wedge
specialized incline plane
pulley and belt
changes direction of applied force
6 simple machines
pulley and belt, lever, screw, incline plane, wheel and axle, screw
class 1 pulley
fixed
class 2 pulley
movable
class 3 pulley
compound
gear
rotating machine part having cut teeth / cogs, which mesh with another toothed part in order to transmit torque
transmittion
two or more gears working in tandem to generate a mechanical advantage (= simple machine)
gear ratio
the ratio / relationship between the numbers of teeth of two gears that are meshed
screw
an inclined plane wrapped helically around an axis for a number of turns
bearing
device that allows constrained relative motion between two or more parts (rotation)
mechanisms
Crank & Slider Mechanism, Ratchet Mechanism, Quick-return Crank Mechanism, Cams:(Eccentric cam, Snail-and-drop cam, Swash-plate cam),Geneva Wheel, Universal Joint
lubricant
a substance inserted between two moving surfaces to reduce friction, improve efficiency, & reduce wear
careers in electronics
Technician, Technologist, Engineer
matter
That which has weight and occupies space
valence shell
outer most shell of an atom
ions
lost or gained an electron
popular source of energy
batteries
current flow
Relationship to Resistance and current flow
conductance
Ability to allow current to flow
resistor
resistor tolerance
The range of acceptable values
Voltage
Current times Resistance

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