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Potential and Kinetic Energy

on Oct 01, 2007

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Potential and Kinetic EnergyPresentation Transcript

• Energy
• Types of Energy
• Potential energy
• Kinetic energy
• The ability to do work
• Shown by:
• Application of force
• Movement of something by that force.
• Force
• Push or pull
• More acceleration = _____ force
• More mass = _____ force
F = ma more more Force = mass X acceleration
• Energy
• Work = force x distance
• ( W = F x d)
• Measured in Joules:
• N (unit of force) combined with with M (unit of distance).
• Potential Energy
• Stored energy:
• Energy that can be burned ____
• Chemical energy stored in _______
• Energy stored in food as ______
• Energy from height above the earth’s surface ________________
fuel a battery sugars gravitational energy
• Gravitational Energy
• Due to the attractive gravitational force between all objects in the universe
• Near Earth’s surface the force due to gravity is 9.8 m/s/s
• Gravitational Energy
• W = F x d
• gPE = mgh
• m = mass of the object
• g = gravitational force
• 9.8 m/s/s
• h = height above the surface of the earth
• Kinetic Energy
• Energy due to motion depends on:
• _____ of the object
• ______ of the object
mass speed
• More connected to speed than mass:
• KE = ½ mv 2
• m = mass
• v = speed
• Conservation of Energy
• Energy can’t be created or destroyed
• Can change from one form to another
• Examples:
• Fuel burning makes ____
• Battery makes ____
• Use gravity to make
• ______
heat light motion