| A | B |
|---|
| kinetic energy | energy a moving object has because of its motion; depends on the mass and speed of the object |
| joule | SI unit of energy |
| potential energy | stored energy an object has due to its position |
| elastic potential energy | energy stored when an object is compressed or stretched |
| chemical potential energy | energy stored in chemical bonds |
| gravitational 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 |
| mechanical energy | sum of the potential energy and kinetic energy in a system |
| law of conservation of energy | states that energy can never be created or destroyed |
| GPE | mgh |
| g= | 9.8m/s/s |
| calorie | 4184 joules |
| friction | causes change of energy in system to thermal energy |
| nuclear fusion | combine H atoms to create He and energy |
| nuclear fission | strike U atom with neutron to create energy |
| radiant energy | travels from the sun to warm earth |
| electrical energy | used to power lights in house |
