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PS Ch 5 Vocab JCG

Section 1-2

QuestionAnswer
Energy a moving object has because of its motion depends on the mass and speed of the object. Kinetic Energy
SI unit of energy. Joule
Stored energy an object has due to its position. Potential Energy
Energy stored when an object is compressed or stretched. Elastic Potential Energy
Energy stored in chemical bonds. Chemical Potential Energy
Energy stored by objects due to their position above Earth's surface; depends on the distance above Earth's surface and the object's mass. Gravitational Potential Energy
Sum of the potential energy and kinetic energy in a system. Mechanical Energy
States that energy can never be created or destroyed. Law of Conservation of Energy
Device that makes doing work easier by increasing the force applied to an object changing the direction of an applied force or increasing the distance over which a force or increasing the distance over which a force can be applied. Machine
The force that is applied to the machine is called the Input force. Input Force
The force applied by the machine is called the output force. Output Force
Ratio of the input force exerted by a machine to the input force applied to the machine. Mechanical Advantage
Ratio of the output work done by the machine to the input work done on the machine expressed as a percentage. Efficiency
Machine that does work with only one movement lever pulley wheel an axle inclined plane screw and wedge. Simple Machine
Simple machine consisting of a bar free to pivot about a fixed point called the fulcrum. Lever
Simple machine that consists of a grooved wheel with a rope chain or cable running along the groove can be either fixed or movable. Pulley
Simple machine that consists of a shaft or axle attached to the center of a larger wheel so that the shaft and the wheel rotate together. Wheel and Axle
Simple machine that consists of a sloping surface, such as a ramp that reduces the amount of force needed to lift something by increasing the distance over which the force is applied. Inclined Plane
Simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post. Screw
Simple machine that is an inclined plane with one or two sloping sides. Wedge
Machine that is a combination of two or more simple machine. Compound Machine
Created by: juan13g
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