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18 Cards in this Set
- Front
- Back
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Gravitational Potential Energy |
Gravitational potential energy is energy an object possesses because of its position in agravitational field. The most common use ofgravitational potential energy is for an object near the surface of the Earth where thegravitational acceleration can be assumed to be constant at about 9.8 m/s2.
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Kinetic Energy
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energy that a body possesses by virtue of being in motion
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Mechanical Energy
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In the physical sciences, mechanical energy is the sum of potential energy and kinetic energy. It is theenergy associated with the motion and position of an object.
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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 |
The SI unit of work is the joule (J), which isdefined as the work expended by a force of one newton through a distance of one metre. |
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Power |
The definition of power is operating electrically or having strength or force |
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Simple Machines |
any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever. |
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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 plane inclined at an angle to the horizontal.a sloping ramp up which heavy loads can be raised by ropes or chains. |
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Wedge
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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
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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 & Axle
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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
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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
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effort distance is the distance through which a machine moves or distance through which the effort force is applied to a machine. (DR) resistance distance is the distance through which the resistance force is applied or the distance through which the object moves.
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resistance (output) force
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In physics, resistance force is the force which an effort force must overcome in order to do work on an object via a simple machine.Resistance force, like most other forces, is measured in newtons or in pounds-force.
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effort (input) distance,
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The distance from the effort on a lever to the fulcrum.
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resistance (output) distance
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In graph theory, the resistance distance between two vertices of a simple connected graph, G, is equal to the resistance between two equivalent points on an electrical network, constructed so as to correspond to G, with each edge being replaced by a 1 ohm resistance. It is a metric on graphs.
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