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Book ‘M’ Chapter 5, Section 2

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Page 1: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Book ‘M’ Chapter 5, Section 2

Page 2: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

The total potential and kinetic energy of particles in an object

Examples◦ Lava: high thermal energy due to high amount of

Kinetic energy◦ Ice cream: low thermal energy due to low amount

of kinetic energy

Page 3: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

The energy of electric charges Moving electric energy is kinetic energy Stored electric energy is potential energy Examples: lightning, handheld games, and

radios

Page 4: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Potential energy stored in the chemical bonds that hold chemical compounds together.

Examples: foods, matches, cell or your bodies

When chemical bonds are broken chemical energy is released.

Page 5: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Type of potential energy Stored in the nucleus of an atom Released during a nuclear reaction Two types:

◦ Fission: splitting of nuclei Nuclear power plants

◦ Fusion: join together of nuclei Sun

Page 6: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Wave with electrical and magnetic properties

Examples: microwaves, X-rays, ultraviolet radiation, infrared radiation, and radio waves

Page 7: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Book M, Chapter 5, Section 3

ENERGY TRANSFORMATIONS AND CONSERVATION

Page 8: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy TransformationsA change from one form of energy to

anotherSingle Transformations:

One form of energy being transformed into another to get work done.

Example: toaster transforms electrical into thermal to toast your bread

Page 9: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy Transformations ContinueMultiple Transformations:

A series of energy transformation to do workExample: the mechanical energy used to

strike a match is transformed first to thermal energy. The thermal energy cause the particles in the match to release stored chemical energy, which is transformed to thermal energy and the electromagnetic energy you see as light.

Mechanical --- thermal---chemical---thermal and electromagnetic

Page 10: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Transformations between potential and kinetic energy

Energy transformation in juggling:As a juggling ball rises it velocity decrease,

thus kinetic energy decreaseAs the ball rises the potential energy increase

because of the increase in heightAt the highest point in the path of juggling

the ball motion has stop, thus is no KE but all the energy is PE

As PE increase KE will always decrease, like wise the as KE increase the PE will decrease

Page 11: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy transformation in juggling

Page 12: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy transformation in a pendulum

Page 13: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy Transformation in a Pole Vault

Page 14: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Conservation of EnergyLaw of conservation of energy: when one

form of energy is transformed to another, no energy is destroyed in the process

ENERGY CANNOT BE CREATED OR DESTROYED!!!!!!!!!!!!!!!!!!!!!!!!!!!

Page 15: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy and FrictionWhen a moving object experiences friction

some kinetic energy is transferred into thermal energy.

Example: warming hands

Page 16: Book ‘M’ Chapter 5, Section 2.  The total potential and kinetic energy of particles in an object  Examples ◦ Lava: high thermal energy due to high amount

Energy and MatterMatter is anything that has mass and

takes up spaceEinstein discovered that matter can be

transformed to energyEnergy and matter together are always

conserved