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physics semester exam terms
semester exam terms
24
Physics
12th Grade
12/15/2008

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Term
physics
Definition
study of the world
Term
dimensional analysis
Definition
changing the units
Term
accuracy
Definition
describes how well the result of a measure agrees with the real value
Term
precision
Definition
degree of exactness of a measurement
Term
motion diagram
Definition
series of images showing the position of an object at equal time intervals
Term
position
Definition
seperation between an object and the origin
Term
distance
Definition
the length of how far an object is from the origin
Term
vector
Definition
quantity that has both magnitude and direction (position)
Term
resultant
Definition
representation of sum of vectors
Term
time interval
Definition
the difference between the initial time and final time
Term
displacement
Definition
change of position during the time interval
Term
average speed
Definition
the absolute value of the average velocity
Term
acceleration
Definition
the rate at which an object's velocity changes
Term
Newton's 1st law
Definition
the tendency of an object to resist change (law of inertia)
Term
Newton's 2nd law
Definition
acceleration of object is equl to sum of forces on object divided by mass of object (a=Fnet/m)
Term
Newton's 3rd law
Definition
for every action there is an equal and opposite reaction (Fa on b=-Fb on a)
Term
inertia
Definition
tendency of an object to resist change
Term
equilibrium
Definition
occurs when the net force of an object is zero
Term
interaction pair
Definition
two forces that are opposite in direction and have equal magnitude. It is also known as a "action-reaction" pair
Term
vector resolution
Definition
process of breaking a vector into its components
Term
projectile
Definition
an object shot in the air
Term
trajectory
Definition
path an object takes in the air
Term
uniform circular motion
Definition
the movemnet of an object at a constant speed around a circle with a fixed radius
Term
centripetal force
Definition
the net force acting toward the center of the circle
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