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Simple Machines

Terms in this set (19)

force
an influence on the shape, motion, or other characteristics of a body or system.
friction
the resistance of a surface to relative motion, as of an object sliding or rolling over it.
fulcrum
the point of support on which a lever turns.
inclined plane
a plane surface inclined at less than a right angle to a horizontal surface, used to roll or slide a load up or down.
lever
any of a class of basic tools consisting of a rigid bar or an equivalent, acting by pivoting around a fixed fulcrum to transfer applied force from one point to another.
load
an amount of something carried; cargo or freight.
machine
a man-made device, usu. driven by a motor or engine, with a system of interrelated parts that work together to perform a task.
axle
a supporting bar or shaft on which, or by means of which, a wheel or wheels turn.
power
physical, mechanical, or electrical energy.
pull
to bring or try to bring closer by exerting force upon.
pulley
a wheel or set of wheels with grooved edges over which a rope or chain can be drawn in order to change the direction of a pulling force and increase the capacity for lifting weight.
push
to thrust (something) away.
screw
a fastener, usu. metal, having a sometimes tapered shank with a helical thread, driven into a surface by applying pressure to the head while turning it.
spring
an elastic device or object that regains its original shape after being compressed, stretched out, or otherwise distorted.
tool
an instrument, such as a hammer, drill, or other hand-held device, used for doing work.
torque
the measured ability of a force to produce turning or twisting around an axis, such as a gear or shaft.
wedge
a piece of wood or metal in a three-dimensional, triangular shape with a thin edge that is driven or forced between objects to split, lift, or reinforce them.
wheel
any instrument, device, or apparatus resembling such a disk or frame in shape, motion, or function.
work
physical or mental effort directed toward achieving some result; labor.
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