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