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23 Cards in this Set
- Front
- Back
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The motion of a body that spins about an axis is?
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Rotational motion
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The line about which the rotation occurs is the?
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Axis of Rotation
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Rotational motion is measured in angles, meaning we use ______ as our unit of measurement.
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Radians
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S is equal to?
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Arc length or displacement along cicumference
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What is the ANGLE through which a point, line or body is rotated about an axis? What is the unit for this?
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Angular displacement (Change in Theta), radians
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What is the RATE at which a body rotates about an axis? What is the units?
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Angular Speed (lowercase Omega), radians per second
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What is the time RATE of change of angular speed? What are the units?
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Angular acceleration (lowercase alpha), radians per second squared
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On a rigid rotating object, how does angular speed and angular acceleration vary between particles?
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they are the same for all
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What is the INSTANTANEOUS linear speed of an object directed along the tangent to the object's circular path?
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tangential speed
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On a rotating body, how does tangential speed vary between particles?
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Differing distances from the axis of rotation cause changes in tangential speed.
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What type of angular speed is used when calculating tangential speed?
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INSTANTANEOUS not average
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What is the INSTANTANEOUS linear acceleration of an object directed along the tangent to the object's circular path?
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Tangential acceleration
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What type of angular acceleration is used for calculating tangential acceleration?
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INSTANTANEOUS not average
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What is the acceleration directed toward the CENTER of a circular path?
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Centripetal acceleration
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Tangential acceleration is due to changing ______, and centripetal is due to changing _____.
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Speed
Direction |
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Tangential and Centripetal acceleration are _____ in relation to each other.
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perpendicular
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Circular motion force is another name for?
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centripetal force
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The force that maintains circular motion is at _____ angles to the direction of the motion?
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Right
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If centripetal force was removed, the object would being to...
and then become a.... |
move in a straight line tangent to the circle
projectile |
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What is a mutual force of attraction between two particles of matter?
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Gravity
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Gravitational force depends on...
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the difference between two masses
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What happens to gravitational force if objects separate?
Move closer? |
Weakens
Strengthens |
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Final card of the set: Make sure you know how to apply your formulas so that you don't use the wrong one!
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Good Luck!
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