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# EA Physics Unit 7

### Circular Motion

TermDefinition
amplitude The maximum displacement from equilibrium
equilibrium A state in which opposing forces in a system are equally balanced
period The time that it takes a complete cycle to occur
frequency The number of cycles or vibrations per unit of time.
pendulum A hanging mass that swings back and forth when pulled to one side and let go.
simple pendulum A specific type of pendulum with a mass hanging from a string or rod with negligible mass about a friction-less pivot.
negligible So unimportant or small that it can be disregarded
cycle A single unit of motion that repeats
gravitational force The mutual force of attraction between particles of matter
mutual A feeling or action experienced by two objects.
G The universal gravitational constant
g The acceleration due to gravity or gravitational field strength. Near Earth's surface, this value is 9.81 m/s/s.
gravitational field strength A value that represents the strength of gravity at a specific location in the universe. Measured in N/kg (which is equivalent to m/s/s), this is another name for acceleration due to gravity.
gravitational field The field of attractive force caused by gravity near a large mass
field An area of space where something (a force) can be felt.
newton's universal law of gravitation States that every mass exerts a force of attraction on every other mass. The strength of the force is directly proportional to the product of the masses divided by the square of the distance between them.
uniform circular motion Any motion in which an object is moving along a curved path at constant speed
centripetal center seeking
centripetal acceleration The acceleration directed toward the center of a circular path (not due to a change in speed, but due to a change in direction of the object).
tangential speed Linear speed along a curved path. The instantaneous magnitude of a revolving object's velocity.
centripetal force The net force required to keep an object moving in a circular path.
centrifugal force An apparent outward force on an object during circular motion caused by inertia. This is a fictitious force (it is not a force, but a sensation you feel)
Created by: ehansen_eak12
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