Kinetic, Potential and Chemical energy

Research & supply appropriate responses;

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1.    Provide a definition of the word Kinetic energy, Potential energy and chemical energy (different sources

KINETIC ENERGY:

http://www.physicsclassroom.com/class/energy/u5l1c.cfm

·        Expressed by the equation: KE = ½ x m x v² . This shows that the value of kinetic energy relies on the mass and velocity (or speed) of the object.

·        Kinetic energy is the energy of motion, whatever moves has kinetic energy

·        E.g. a moving kart has kinetic energy as it is moving,

POTENTIAL ENERGY:

http://www.physicsclassroom.com/class/energy/U5L1b.cfm

·        PE = m x g x h.

·        This form of energy depends on its elevation or position.

·        It is often related to kinetic energy as potential converts into kinetic and visa versa

·        E.g. a stretched bow contains a lot of kinetic energy

CHEMICAL ENERGY:

http://www.eschooltoday.com/energy/kinds-of-energy/what-is-chemical-energy.html

·        Chemical energy is stored in atoms and molecules (bonds of chemical compounds) and is released in chemical reactions (often in the form of heat)

·        Eg. Firewood has chemical energy. When it is lit it converts into thermal and light energy.

2.    Give an example an example for each type As shown above

3.    State the law associated with the conservation of energy (http://library.thinkquest.org/2745/data/lawce1.htm)

The law of conservation of energy states that energy cannot be created or destroyed but only changing in form. One of the most common examples of this is the newton’s cradle; when the ball is released and hits the clump of balls, the ball at the end flies out to a similar height – thus showing that the energy has been converted from the original ball onto the ball at the other end. The balls eventually rise to a lower height and stop because as well as energy being released as kinetic energy (from potential) but also into sound energy.