Ch 4 Vocabulary Words

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Across
  1. 4. energy a moving object has because of its motion; determined by the mass and speed of the object
  2. 5. machine that is a combination of two or more simple machines
  3. 6. a region or set of regions around which a boundary can be defined
  4. 8. energy that is due to the gravitational force between two objects
  5. 10. ratio of the output work done by the machine to the input work done on the machine, expressed as a percentage
  6. 13. states that energy cannot be created or destroyed
  7. 14. device that makes doing work easier by increasing the force applied to an object, changing the direction over which a force can be applied
  8. 16. transfer of energy when a force is applied over a distance; measured in joules
Down
  1. 1. sum of the potential energy and kinetic energy of the objects in a system
  2. 2. ratio of the output force exerted by a machine to the input force applied to the machine
  3. 3. energy that is due to chemical bonds
  4. 7. energy that is stored by compressing or stretching an object
  5. 9. machine that does work with only one movement; examples include lever, pulley, wheel and axle, inclined plane, screw, and wedge
  6. 11. the ability to cause change, measured in joules
  7. 12. energy that is stored due to the interactions between objects
  8. 15. rate at which energy is converted; measured in watts