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chapter 11
vocab
25
Physics
10th Grade
01/25/2012

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Term
physics
Definition
study of motion, forces & energy of universe
Term
motion
Definition
change in position relative to a reference point
Term
reference point
Definition
observe object in a relation to others that stay in place
Term
frame of reference
Definition
exact locations of objects in space and time
Term
displacemnt
Definition
change in position of object
Term
speed
Definition
how fast an object more
Term
velocity
Definition
speed of an object in a particular direction
Term
constant speed
Definition
equal distances in equal amount of time
Term
average speed
Definition
change in speed from one instant to another
Term
instamious
Definition
speedmeasure in infinity small time
Term
acceleration
Definition
rate which velocity changes over time
Term
centripetal acceleration
Definition
acceleration in circular motion
Term
constant acceleration
Definition
speed changes by same amount over each time interval
Term
force
Definition
any action that change the state of motion of an object
Term
contact forces
Definition
stops and moves according to force
Term
field forces
Definition
dont require that the objects touch each other
Term
net force
Definition
combination of all forces
Term
friction
Definition
force that oposses motion ( slows you down)
Term
static friction
Definition
force resists iniation of sliding motion that are in contect and vest
Term
kinetict fricition
Definition
opposses motion of 2 surfaces in contact & moving over each other
Term
sliding friction
Definition
object slide past eachother
Term
rolling friction
Definition
round object rolls over flat surface
Term
lubricants
Definition
substances applied to surface to lower friction between them
Term
initial velocity
Definition
speed you started off with ( speed up)
Term
final velocity
Definition
speed that slowes down ( ends withs)
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