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Agricultural Power and Technology
Agricultural Power and Technology
Energy
Unit 1 – Lesson 1.2 Mechanical Basics
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What is Energy?
• Energy is the ability to perform work or
cause change.
• Work is a change in a position caused by
a force.
– Moving a pencil, opening a door, and carrying
a backpack are examples of work.
– What are some agricultural examples of
work?
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Two Types of Energy
• Potential
– Stored Energy
• Water behind a dam.
• Wagon on top of a hill.
• Gasoline ready to combust.
• Kinetic
– Energy being used to perform work
• Gasoline combusting to run an engine.
• Engine powering a tractor in a field.
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Forms of Potential Energy
• Chemical Energy
– Energy stored between bonds of atoms
• Food has potential energy that can be digested.
• Batteries have chemical energy stored to power
everything from tools to toys.
• Fuel has potential energy to combust and cause
movement.
• Gravitational Energy
– The attractive force all objects have towards each
other.
• An object on top of the hill has potential for gravity to
pull it to the bottom.
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Renewable and Non-renewable
Energy
Potential energy can be renewable or non-renewable.
Renewable
• Air
– Wind energy to produce
electricity.
• Ethanol
– Biofuel to power vehicles.
• Water
– Dams produce electricity.
Non-renewable
• Fossil Fuels
– Gasoline to power
vehicles.
• Coal
– Burned to produce steam
that is converted to
electricity.
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Forms of Kinetic Energy
•
•
•
•
•
Electrical
Mechanical
Thermal
Gravitational
Sound
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Electrical Energy
• Movement of electrons
through a conductor.
• Most common source of
energy.
• Powers lights,
appliances, and hand
held tools.
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Mechanical Energy
• Energy produced from
physical movement.
• Turbine moved by
wind.
• Skid steer lifting a load.
• Piston moving up or
down.
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Thermal Energy
• Heat energy produced
by the movement of
atoms.
• When fuels are burned,
energy is released in
the form of heat.
• Thermal energy is
released every time
energy is transferred.
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Gravitational Energy
• Attractive force that all
objects have toward one
another
• Dependent upon the
mass of the object
• Gravitational force
keeping us grounded to
Earth
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Sound Energy
• Travels in the form of
waves.
• Sound waves must
travel through some
form of matter.
• Some sounds can be
damaging to the ear.
– Important energy to
understand when
assessing a tool or
workplace for safety.
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References
• Butz, S. D. (2015). The Laws of
Thermodynamics. Energy and agriculture.
(1st ed.). Stamford, CT: Cengage
Learning.
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