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π = ___ degrees
180
ω:
angular speed. Similar to velocity
ω =
Δθ/Δt
V
_{t}
=
rω
(tangential speed)
P:
Period. Time it takes to complete one revolution.
f:
Frequency. How many revolutions per second
Formula for frequency:
f=1/T
α:
angular acceleration
Formula for angular acceleration
α=Δω/Δt
A
_{c}
:
centripetal acceleration. Moves towards center of circle.
Law of gravitation
Fg=Gm
_{1}
m
_{2}
/r
^{2}
r
: disance between m
_{1}
and m
_{2}
G=6.67 x 10
^{-11}
F
_{c}
:
Centripetal Force. Net force pointing towards center
Formula for Centripetal Force:
F
_{c}
=ma
_{c}
F
_{c}
=mv
^{2}
/r
Formula for Torque
τ = r
_{⊥}
F = rFsinθ
Torque is positive if
counterclockwise
Torque is negative if
clockwise
Translational Motion
normal velocity
Rotational Motion
angular velocity
Newton's 2nd Law: Rotational Form
Στ=Iα
Rotational Kinetic Energy
K
_{r}
=1/2Iω
^{2}
Translational Kinetic Energy
K
_{t}
=1/2mv
^{2}
Conservation of Angular Momentum
I
_{o}
ω
_{o}
=Iω
θ units
radians
ω units
rad/s
α units
rad/s
^{2}
Author
andreabyerly
ID
46840
Card Set
Physics
Description
Physics- Circular Movement
Updated
2010-11-02T23:21:33Z
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