30 terms

# University Physics Exam 2

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Dot Product
When the product of two vectors is a scaler
Cross Product
When the product of two vectors is another vector
Cross Product Magnitude
Vector A x B x sin(angle between A and B)
This is equal to the area of the formed parallelogram. The direction is perpendicular to the A and B Vectors
Right Hand Cross Product Rule
Fingers point in the plane of A and B. The thumb determines the direction of the resultant vector.
Torque
A vector perpendicular to the position and force vectors.
T = r x F
Positive Angular Displacement
Occurs when rotational motion is counterclockwise.
Negative Angular Displacement
Occurs when rotational motion is clockwise.
Theta of Angular Motion
Angular Displacement
The angle through which the object rotates.
Average Angular Velocity
= Angular displacement/Elapsed Time
Instantaneous Angular Velocity
The limit as t goes to 0 of Average Angular Velocity.
Average Angular Acceleration
Change in Angular Velocity/Elapsed Time
Instantaneous Angular Acceleration
Is the limit as change in t goes to 0 of Average Angular Acceleration.
Positive Angular Acceleration
Occurs when an object is rotating counterclockwise and speeding up, or when rotating clockwise and slowing down.
Negative Angular Acceleration
Occurs when an object is rotating clockwise and speeding up, or when a rotating counterclockwise and slowing down.
Right Hand Rule of Angular Velocity
Wrap fingers around axis of rotation with the fingers pointing in the direction of rotation. The extended thumb gives the direction of angular acceleration and velocity.
Single Point on Rotation
Each point on an object that is rotating has it's own angular velocity and linear velocity.
v = R x w. Points farther from the axis have higher linear velocity.
Tangential Acceleration
Occurs when the angular velocity of a rotating object changes.
Centripetal Acceleration
Occurs when the the angular velocity is constant.
Frequency
The number of complete revolutions per second. Is measured in Hz.
f = Angular Velocity/2pi
Period
The time it takes for one full revolution
p = 1/f
Moment of Inertia Equation
p (Inertia Moment)
Volumetric Mass Density.
Mass/Volume Unit
o (Inertia Moment)
Surface Mass Density.
Mass/Area= pt
Newton's First Law
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Newton's Second Law
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Newton's Third Law
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Moment of Inertia Equation
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Moment of Inertia Equation
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Frequency
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