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VOCABULARY SHEET #7

Across
a sloping ramp up which heavy loads can be raised by ropes or chains
the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors
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
a machine made up of two or more simple machines
the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
the ability to do something or act in a particular way, especially as a faculty or quality
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
the strength and vitality required for sustained physical or mental activity
a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to provide mechanical advantage
Down
the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object
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
energy that a body possesses by virtue of being in motion
a change in the identity or characteristics of an atomic nucleus that results when it is bombarded with an energetic particle, as in fission, fusion, or radioactive decay
any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever
activity involving mental or physical effort done in order to achieve a purpose or result
an apparatus using or applying mechanical power and having several parts, each with a definite function and together performing a particular task
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
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