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midterm 2
roration, gravitation, states of matter, pressure, fluids in motion, etc.
14
Physics
Undergraduate 1
04/23/2008

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Term
Rotational Motion
Definition
Motion around a fixed point
Term
Translational motion
Definition
movement of an object from point to point
Term
rotational inertia
Definition
object at rest or rotation will stay in that state unless acted on by outside torque
Term
Angular velocity
Definition
how fast the angular position changes
Term
angular speed
Definition
change in angle/time
Term
Newtons first law of rotational motion
Definition
an object not wobbling and has no outside torque will rorate with constant angular velocity about a fixed axis
Term
torque
Definition
a force that results in angular acceleration
Term
angular acceleration
Definition
how quickly angular velocity changes
Term
newtons second law of rotational motion
Definition
torque=rotational mass x angular acceleration
Term
lever arm
Definition
distance from axis of rotation to the point of the force
Term
kepler's first law
Definition
all planets move in elliptical orbits, with the sun at one focus of the ellipse
Term
Kepler's second law
Definition
A line stretching from the sun to a planet sweeps out equal areas in equal times.
Term
Kepler's third law
Definition
the square of a planet's orbital period is proportional to the cube of that planet's mean distance from the sun
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