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Physical Since Ch. 4
Physical Science Ch.4
Term | Definition |
---|---|
Work | The force applied through a distance |
Machine | a device that changes the force of increases the motion from work |
Simple machine | a machine that does work with only one movement of the machine |
Compound machine | a combination of two or more simple machines |
Efficiency | the ratio of output work to input work |
Mechanical advantage | the ration of the output force to input force |
Energy | the ability to cause change |
System | anything around which you can imagine a boundary |
Kinetic energy | energy due to motion |
Potential energy | energy that is stored is to the interactions between objects |
Elastic potential energy | energy that is stored by compressing or stretching an object |
Chemical potential energy | energy that is due to chemical bonds |
Gravitational potential energy | energy that is due to the gravitational forces between objects |
Law of conservation of energy | states that energy can't be created or destroyed |
Mechanical energy | the sum of kinetic energy and potential energy of the objects in a system. |
Power | the rate at which energy is converted |