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Energy Transfer & Transformations How does energy impact the motion of an object?

Energy Transfer & Transformations How does energy impact the motion of an object?

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Energy and Work : Working Together Energy is the ability to do work Work is done when a force causes an object to move in the direction of the force. Think of an example of a force causing an object to move. Write it down and explain.

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Page 1: Energy Transfer & Transformations How does energy impact the motion of an object?

Energy Transfer & Transformations

How does energy impact the motion of an object?

Page 2: Energy Transfer & Transformations How does energy impact the motion of an object?

Chapter 4 Energy

• Brain Pop Video Forms of Energy• http://www.brainpop.com/science/energy/for

msofenergy/• Brain Pop Video Where does Energy come

from?• http://www.brainpop.com/science/energy/en

ergysources/

Page 3: Energy Transfer & Transformations How does energy impact the motion of an object?

Energy and Work : Working Togetherhttp://www.kids.esdb.bg/index.html http://www.nnec.coop/powerkids/energyfacts.html

• Energy is the ability to do work• Work is done when a force causes an object to

move in the direction of the force.

• Think of an example of a force causing an object to move. Write it down and explain.

Page 4: Energy Transfer & Transformations How does energy impact the motion of an object?

Energy and Work : Working Together

• When one object does work on another, energy is transferred from the first object to the second object.

• This means work is a transfer of energy, which is expressed in units called JOULES (J)

• QUESTION: What is energy?

Page 5: Energy Transfer & Transformations How does energy impact the motion of an object?

Kinetic Energy• Kinetic Energy is the energy of motion• All moving objects have kinetic energy.• Make a list of objects exhibiting kinetic energy.• Mass and speed are factors that determine how

much kinetic energy an object has.• The faster an object is going the more kinetic

energy it has.• The more mass an object has the greater its

kinetic energy will be.• Mass and speed do not affect an object equally

Page 6: Energy Transfer & Transformations How does energy impact the motion of an object?

Kinetic Energy

• Brain Pop Video Kinetic Energy• http://www.brainpop.com/science/energy/ki

neticenergy/

Page 7: Energy Transfer & Transformations How does energy impact the motion of an object?

Potential Energy

• Potential energy is the energy an object has because of the position, shape or condition of the object.

• Example: A stretched rubber band• Gravitational Potential Energy is what

happens when an object is lifted and energy is transferred to it.

• Example: lifting a barbell, the barbell has the Gravitational Potential Energy

Page 8: Energy Transfer & Transformations How does energy impact the motion of an object?

Potential Energy

• Brain Pop Video Potential Energy• http://www.brainpop.com/science/energy/po

tentialenergy/

Page 9: Energy Transfer & Transformations How does energy impact the motion of an object?

Mechanical Energyhttp://www.kids.esdb.bg/mechanical_principles.html

• Mechanical energy is the amount of work an object can do because of the object’s kinetic and potential energies.

• Mechanical energy is the total energy of motion and position of an object.

• Both kinetic and potential energies are types of mechanical energy.

• Mechanical energy can be made up of both kinetic and potential or some of each.

Page 10: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energy

Thermal Energy• Thermal Energy is all of the kinetic energy due

to the random motion of the particles that make up the object (its atoms).

• It is most often measured by measuring temperature

Page 11: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energyhttp://www.brainpop.com/health/nutrition/carbohydrates/

http://www.brainpop.com/health/nutrition/metabolism/

Chemical Energy• Chemical energy is energy stored in chemical

bonds.• Chemical energy is a form of potential energy.• Energy in food is stored as chemical energy.

Page 12: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energyhttp://www.brainpop.com/science/energy/currentelectricity/

http://www.brainpop.com/science/energy/electricity/ http://www.brainpop.com/science/energy/electriccircuits/

http://www.brainpop.com/science/energy/batteries/

Electrical Energy• Electrical energy is the energy of moving

electrons.• Electrical Energy is what is stored in a battery,

and can be used to power a cell phone or start a car.

• Electrical energy is delivered by tiny charged particles called electrons, typically moving through a wire.

• Lightning is an example of electrical energy in nature, so powerful that it is not confined to a wire.

Page 13: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energyhttp://www.brainpop.com/science/energy/sound/

Sound Energy• Sound is the movement of energy through

substances in longitudinal (compression/rarefaction) waves.

• Sound is produced when a force causes an object or substance to vibrate — the energy is transferred through the substance in a wave.

• Typically, the energy in sound is far less than other forms of energy.

Page 14: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energy

http://www.brainpop.com/science/energy/light/ http://www.brainpop.com/science/space/sun/ http://www.brainpop.com/science/energy/solarenergy/

Light Energy• Light energy is a type of radiant energy.• Radiant Energy is electromagnetic energy that

travels in transverse waves. • Radiant energy includes visible light, x-rays,

gamma rays and radio waves. • Light is one type of radiant energy. • Sunshine is radiant energy, which provides the

fuel and warmth that make life on Earth possible.

Page 15: Energy Transfer & Transformations How does energy impact the motion of an object?

Other Forms of Energyhttp://www.brainpop.com/science/energy/nuclearenergy/

Nuclear Energy• Nuclear Energy is energy stored in the nucleus of

an atom — the energy that holds the nucleus together.

• Very large amounts of energy can be released when the nuclei are combined or split apart.

• Nuclear power plants split the nuclei of uranium atoms in a process called fission.

• The sun combines the nuclei of hydrogen atoms in a process called fusion.