Hartland High School

Motion in 2&3 Dimensions Test

Chemical Energy (E_Ch):  Chemical energy is the energy stored in chemicals; it's useful to think of this as the energy stored in food or fuel.  Fuels like gasoline in a car and carbohydrates in the human body are sources of chemical energy.  If a person is part of the system and is pushing, pulling, jumping, climbing, etc., then the person is using their E_Ch to affect the motion.

Internal Energy (E_Int): We call this Dissipated Energy (E_diss)  It is the energy associated with particles (atoms and molecules) vibrating within the objects of the system. These particles always vibrate but sometimes the amount of vibration increases due to the production of sound and heat. So think about the objects within the system and whether or not they are warming up (perhaps due to friction) or producing sound (as a result of a collision).