college and engineering physics potential energy 1 toc definition of potential energy examples of...
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College and Engineering Physics
Potential Energy
1
TOC
Definition of Potential Energy
Examples of Potential Energy
Types of Potential Energy
College and Engineering Physics
Potential Energy
2
TOC
Definition of Potential Energy
Some types of conservative forces lend themselves to replacing work by what we call potential energy.
Potential energy is so called because it measures the potential of a particle to have kinetic energy.
Equations for various types of potential energy are always given by the following equation
object an on forcethat by doneforce particular afor object an a of WU
The unit of potential energy is the same as that for work.
College and Engineering Physics
Potential Energy
3
TOC
Example with gravity (The system is gravity, the block and the earth)
m
Δh
hmgmgdyWh
0
Work done by gravity (which is part of the system)
Potential energy of system
hmgU g
System
m
College and Engineering Physics
Potential Energy
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TOC
Example with elastic force (The system is the spring, the block and the thing that the thing to which the other side of the spring attaches)
2
0 2
1kxkxdxW
x
Work done by gravity (which is part of the system)
Potential energy of system
2
2
1kxU sp
System
xk
Felastic
College and Engineering Physics
Potential Energy
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Types of Potential Energy
Gravitational Potential Energy
hmgU g
Elastic Potential Energy
2
2
1kxU sp
r
mmGU g
21
College and Engineering Physics
Potential Energy
6
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