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18 Cards in this Set
- Front
- Back
Gravitational Potential Energy
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energy an object possesses because of its position in gravitational field. |
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Kinetic Energy |
the energy of motion. |
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Mechanical Energy |
the sum of potential energy and kinetic energy. |
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Conservation of Energy |
a principle stating that energy cannot be created or destroyed, but can be altered from one form to another. |
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Work |
activity involving mental or physical effort done in order to achieve a purpose or result |
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Power |
the rate of doing work. |
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Simple machines |
any of the basic mechanical devices for applying a force. |
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Lever |
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. |
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Pulley |
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. |
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Incline Plane |
a sloping ramp up which heavy loads can be raised by ropes or chains. |
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Wedge |
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. |
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Screw |
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
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Wheel and axle |
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. |
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Mechanical Advantage |
the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
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effort (input) force |
the effort force is the force applied to a machine.
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Resistance (output) force |
the work done on a machine.
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effort (input) distance |
the work input of a machine is equal to the effort force times the distance over which the effort force is exerted.
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Resistance (output) distance |
the work input of a machine is equal to the effort force times the distance over which the effort force is exerted.
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