 # Energy What is energy?.  Energy is the ability to do work or cause change.

## Presentation on theme: "Energy What is energy?.  Energy is the ability to do work or cause change."— Presentation transcript:

Energy What is energy?

 Energy is the ability to do work or cause change.

What is energy?  Energy is the ability to do work or cause change.  Work = Force * distance

What is energy?  Energy is the ability to do work or cause change.  Work = Force * distance  Force = Mass * Acceleration

What is energy?  Energy is the ability to do work or cause change.  The total amount of energy in the universe doesn’t change and has always been here.

What is energy?  Energy is the ability to do work or cause change.  The total amount of energy in the universe doesn’t change and has always been here. –1 st Law of Thermodynamics

What forms does energy come in?

 Kinetic energy:

What forms does energy come in?  Kinetic energy: The energy an object has due to its motion.

What forms does energy come in?  Kinetic energy: The energy an object has due to its motion. –The kinetic energy of an object is due to both its mass and velocity.

What forms does energy come in?  Kinetic energy: The energy an object has due to its motion. –The kinetic energy of an object is due to both its mass and velocity. –Kinetic energy = ½ X mass X velocity

What forms does energy come in? –Potential energy:

What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.

What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy:

What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height.

What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height. –Gravitational potential energy = weight X height

Question?  Who has more gravitational potential energy? –Skier A has a mass of 50 kg and a height of 5m. –Skier B has a mass of 60 kg and a height of 4m.

Question?  Who has more gravitational potential energy? –Skier A has a mass of 50 kg and a height of 5m. GPE = 50X5 = 250 J –Skier B has a mass of 60 kg and a height of 4m. GPE = 60X4 = 240 J

What forms does energy come in? –Potential energy: Stored energy that results from the position or shape of an object.  Gravitational potential energy: Potential energy related to an object’s height. –Gravitational potential energy = weight X height  Elastic potential energy: The potential energy of objects that can be stretched or compressed.

What are some types of energy?

 Electromagnetic  Thermal  Sound  Mechanical  Electrical  Nuclear  Chemical

What are some types of energy?  Electromagnetic: Energy that is caused by the acceleration of charged particles.

What are some types of energy?  Electromagnetic: Energy that is caused by the acceleration of charged particles.  Thermal: The total of all potential and kinetic energy of a particle.

What are some types of energy?

 Electromagnetic: Energy that is caused by the acceleration of charged particles.  Thermal: The total of the potential and kinetic energy of the particles in an object.  Sound: The energy produced by an object’s vibration.

What are some types of energy?  Mechanical: The form of energy that is associated with the position and motion of an object.

What are some types of energy?

 Mechanical: The form of energy that is associated with the position and motion of an object.  Electrical: The energy of electrical charges and can be potential or kinetic.

What are some types of energy?

 Nuclear: A type of potential energy that is stored in the nucleus of an atom.

What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus.

What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus. –Nuclear fusion: The fusing of two separate nuclei into one nucleus.

What are some types of energy?  Nuclear: A type of potential energy that is stored in the nucleus of an atom. –Nuclear fission: The splitting of nucleus. –Nuclear fusion: The fusing of two separate nuclei into one nucleus.  Chemical: Potential energy that is stored in the chemical bonds that hold chemical compounds together.

Can energy change from one type to another?

 ABSOLUTELY

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