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Energy Momentum Force diagram
11
momentum = mass x velocity
Kinetic energy = 1/2 x mass x velocity x velocity
Objects that have mass and
are moving have both momentum
and kinetic energy.
Momentum
Only comes in one type.
Energy
Multiple types:
- kinetic
- gravitational potential
- electrical
- magnetic
- chemical
- nuclear
- thermal
Can't be contained or stored
Can be stored as potential energy
Total amount stays the
same within a system with
no external influences
zero when the object isn't moving
KE is zero when not moving, but there
could be potential or thermal energy
More useful for simple systems of a few moving objects
More useful for complex systems
Unit: kgm/s
Unit: Joules (J) or calories (c)
"How difficult an object is to stop"
The ability to do work
Law of Conservation is time symmetry
that reveals really interesting ideas about
the way that our universe behaves (Big Bang,
Dark Energy, Quantum fluctuations, etc)