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US

10903660

Rotational Motion

- Energy
- Energy Bar Graphs
- Used to show the
energy before and
after, as well as
the system
- Energy Statement
- Conserved
- No outside
torques
- E₀ = E

- No outside
torques
- Not Conserved
- E₀ ≠ E
- Outside torque
acts on the
system

- E₀ ≠ E
- Used to show if
there are outside
torques

- Conserved
- Energy Types
- Ug
- Gravitational
Energy
- Regular Motion
- mgh

- mgh
- Orbits
- (Gm₁m₂)/(r²)

- (Gm₁m₂)/(r²)

- Gravitational
Energy
- Kₜ
- Translational
Energy
- ½mv²

- Translational
Energy
- Kᵣₒₜ
- Rotational
Energy
- ½Iα²

- Rotational
Energy

- Ug
- System
- What objects are
being affected by the torques
- Earth
- If no earth in
system, use no
Ug

- If no earth in
system, use no
Ug

- What objects are
being affected by the torques

- Used to show the
energy before and
after, as well as
the system

- Energy Bar Graphs
- Forces
- ΣF = ma
- Mass
- Use Kilograms

- Use Kilograms
- Linear Variables
- Bridge Equations
- α = a/r
- ω = v/r

- α = a/r
- a
- v

- Bridge Equations
- Forces
- Fₜ
- Use both
rotational and
linear 2nd law
to solve for
- Force of tension

- Use both
rotational and
linear 2nd law
to solve for
- Fg
- mg
- Force of Gravity; always
faces straight down

- mg
- Fₙ
- Normal Force
- Use both
rotational and
linear 2nd law
to solve for

- Normal Force
- Fₛ
- Static Friction
(no slipping)
- Use both rotational
and linear 2nd law
to solve for

- Static Friction
(no slipping)

- Fₜ

- Mass
- Στ = Iα
- Inertia
- How difficult it is to
accelerate an object
- c mr²
- Value of c varies based on
the shape and type of an
object
- A larger c means a
smaller α

- A larger c means a
smaller α

- Value of c varies based on
the shape and type of an
object

- How difficult it is to
accelerate an object
- Rotational Variables
- α
- Rotational
acceleration

- Rotational
acceleration
- ω
- Rotational
Velocity

- Rotational
Velocity

- α
- Torque
- The rotational
equivalent of
force
- Fr

- The rotational
equivalent of
force

- Inertia

- ΣF = ma

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