ENERGY

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ENERGY
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• Kinetic Energy (KE)
• 1. Energy in the form
• of motion.
• 2. Energy Depends On
• a. Mass of the object.
• b. Velocity of the
• object.

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• Potential Energy (PE)
• 1. Energy that is stored
• or has the potential to
• cause change.
• ex. Flower pot on a
• ledge.
• 2. Depends on the position
• of the object.
• ex. The higher the flower
• pot the greater the PE.

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The Roller Coaster
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The Pendulum
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• Mechanical Energy (ME)
• 1. Total Amount of Energy
• in the System.
• 2. PE KE ME

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• Law of Conservation of Energy
• - in any given situation, energy
• may change form, but it
• cannot be created or
• destroyed.

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Why does the swing not swing forever? -Some
energy lost due to friction, air resistance.
-Some changes to thermal energy (HEAT).
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• Thermal Energy
• -(not the same as temp.)
• 1. Temperature- measure of
• average kinetic energy in a
• sample.
• 2. Thermal Energy- total
• energy (KE PE) of the
• particles in a material.
• (more mass more moving particles
• more Thermal Energy)

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• Heat
• 1. Thermal Energy flowing
• through something from
• high temperature to
• low temperature.
• 2. Also measured in Joules

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• Specific Heat-
• 1. Amount of Energy it
• takes to raise the temp.
• of 1 kg of material 1 K.
• 2. Measured in Joules/Kg

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• Thermal Energy Formula
• Change in TE m x ? Temp. x Specific Heat(C)
• (Tf Ti)