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Sasser S8P3c
Physical Science
Term | Definition |
---|---|
screw | a simple machine that consists of an inclined plane wrapped around a cylinder |
pulley | a simple machine that consists of a wheel over which a rope, chain, or wire passes |
lever | a simple machine that consists of a bar that pivots at a fixed pint |
wedge | a simple machine that is made up of two inclined planes and that moves; often used for cutting |
work | the transfer of energy to an object by using a force that causes the object to move in the direction of the force |
inclined plane | a simple machine that is straight, slanted surface, which facilitates the raising of loads; a ramp |
wheel and axle | a simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects |
simple machine | a simple device for altering the magnitude or direction of a force. The six basic types are the lever, wheel and axle, pulley, screw, wedge, and inclined plane |
force | a push or pull exerted on an object in order to change the motion of the object; force has size and direction |
pivot | the central point, pin, or shaft on which a mechanism turns or oscillates. |
power | the rate at which work is done or energy is transormed |
effort | an exertion of strength or power, whether physical or mental, in performing an act or aiming at an object |
fulcrum | is a pivot point around which a lever turns, or something that plays a central role in or is in the center of a situation or activity |
fixed point | a reproducible invariant temperature; the boiling point, freezing point, or triple point of a substance, such as water, that is used to calibrate a thermometer or define a temperature scale |
complex machine | is a machine made up of two or more simple machines. Example: car |
mechanical advantage | The ratio of the output force (acting on a load) produced by a machine to the applied effort (the input force). |