cat 1
activity involving mental or physical effort done in order to achieve a purpose or result.
WORK
an apparatus using or applying mechanical power and having several parts, each with a definite function and together performing a particular task
machine
any resources used to create goods and services
work input
the state or quality of being efficient
efficiency
a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage
wheel and axle
the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force, equivalent to one 3600th of a watt-hour.
joule
the force you apply to the machine
input force
the energy given by the machine to do useful work
work output
a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other
lever
a plane inclined at an angle to the horizontal
inclined plane
the ability to do something or act in a particular way, especially as a faculty or quality.
power
the force that you would need to lift the object without the inclined plane
output force
the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
mechanical advantage
the point on which a lever rests or is supported and on which it pivots
fulcrum
a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them
wedge
the SI unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere
watt
the distance over which the input force is applied
input distance
the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
actual mechanical advantage
The side of a lever on which force is applied
input arm
a short, slender, sharp-pointed metal pin with a raised helical thread running around it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place
screw
unit of power equal to 550 foot-pounds per second (745.7 watts).
horsepower
the height of the ramp, or the vertical distance the object is raised
output distance
the mechanical advantage of a perfect machine with no loss of useful work caused by friction between moving parts
ideal mechanical advantage
the por- tion of the lever directly connected to the load
output arm
a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.
pulley