Conservation of Energy (E)

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Conservation of Energy (E)
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Conservation of Energy (E)
Energy (E) means Total Energy
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Drop a Ball off a Cliff
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Drop a Ball off a Cliff
When is the ball moving the fastest?
at the lowest point
just before it hits the grounds and just after
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Drop a Ball off a Cliff
When is the ball moving the fastest?
at the lowest point
When is the ball moving the slowest?
at the highest point (it has to stop in order to
change directions)
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Drop a Ball off a Cliff
When is the ball moving the fastest?
at the lowest point
When is the ball moving the slowest?
at the highest point
What is the ball trading for speed?
height
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Conservation of Energy
Us
Ug
K
E
J. Gabrielse
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Conservation of Energy
Ug
K
E
Gravitational Potential Energy Depends on Height
J. Gabrielse
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Conservation of Energy
Ug
K
E
Kinetic Energy Depends on Speed
J. Gabrielse
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Conservation of Energy
Ug
K
E
Us
Mechanical Potential Energy Depends on
Deformation
J. Gabrielse
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E Us Ug K
Ug
K
E
Us
J. Gabrielse
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Total Energy Doesnt Change
Ug
K
E


Us

J. Gabrielse
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Energy Notes (Continued)
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Conservation of Energy with a Pendulum
When is the pendulum moving the fastest?
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Conservation of Energy with a Pendulum
When is the pendulum moving the fastest?
at the lowest point
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Conservation of Energy with a Pendulum
When does the pendulum have the most kinetic
energy?
at the lowest point
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Conservation of Energy with a Pendulum
When does the pendulum have the
most gravitational potential energy?
at the highest point
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Conservation of Energy with a Pendulum
E
K
Ug
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Conservation of Energy with a Pendulum
E
K
Ug
Gravitational Potential Energy Depends on Height
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Conservation of Energy with a Pendulum
E
Ug
K
Kinetic Energy Depends on Speed
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E Ug K
E
K
Ug
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Total Energy Doesnt Change
E
K
Ug


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Pendulum Review
Where is the gravitational potential energy
maximum? Where is the kinetic energy
maximum? Where is the gravitational potential
energy minimum? Where is the kinetic energy
minimum?
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Your TurnConservation of Energy