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Sci. 5-1 What is Energy? Pages 116-123. A. Energy - is the ability to do work and work is the transfer of energy. B. Both energy and work are expressed in Joules (J). C. Kinetic Energy - the energy of motion. D. Kinetic energy depends on. Speed. and. Mass.

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Sci. 5-1 What is Energy? Pages 116-123

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Sci 5 1 what is energy pages 116 123

Sci. 5-1

What is Energy?

Pages 116-123


Sci 5 1 what is energy pages 116 123

A. Energy- is the ability to do work and work is the transfer of energy


Sci 5 1 what is energy pages 116 123

B. Both energy and work are expressed in Joules (J).


Sci 5 1 what is energy pages 116 123

C. Kinetic Energy- the energy of motion.


Sci 5 1 what is energy pages 116 123

D. Kinetic energy depends on

Speed

and

Mass


Sci 5 1 what is energy pages 116 123

  • Speed has a greater impact on kinetic energy than does mass because speed is squared.

  • Kinetic Energy formula

  • m = mass v= speed

KE=mv

2

2


Sci 5 1 what is energy pages 116 123

G. Potential Energy- the energy an object has because of its position or shape. It has energy because work has been already done to it.


Sci 5 1 what is energy pages 116 123

H. Gravitational Potential Energy happens when something has been lifted. GPE = weight x height

Newtons x meters

Which is the same as work W=Fxd


Sci 5 1 what is energy pages 116 123

  • I. Mechanical Energy- the total energy of motion and position of an object.

  • Mechanical Energy = Potential Energy + Kinetic Energy

  • When potential energy increases, kinetic energy decreases.


Sci 5 1 what is energy pages 116 123

J. Six forms of energy are thermal, chemical, electrical, sound, light, and nuclear.


Sci 5 1 what is energy pages 116 123

1) Thermal Energy (heat) – all matter has particles in constant motion. The hotter the object then the faster the particles move.


Sci 5 1 what is energy pages 116 123

2) Chemical Energy- the energy of a compound that changes as its atoms rearrange to form a new compound


Sci 5 1 what is energy pages 116 123

3) Electrical Energy- the energy of moving electrons. Electrons are negatively charged particles of an atom.


Sci 5 1 what is energy pages 116 123

4) Sound Energy- caused by an object’s vibrations. The object vibrates which causes the air to vibrate which causes your eardrum to vibrate and you hear sound.


Sci 5 1 what is energy pages 116 123

5) Light Energy- produced by vibrations of electrically charged particles, NOT ALL light can be seen.


Sci 5 1 what is energy pages 116 123

6) Nuclear Energy- produced by an atom’s nucleus splitting or when two nuclei join together.


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