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Test- acceleration, speed, velocity, etc.
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Terms in this set (17)
scalar
defined by magnitude or numerical value
NOT DIRECTION
vector
described by both magnitude and direction
displacement
a vector quantity, difference between final position and initial position, includes direction
-overall change in position
-displacement = slope (change in y/change in x)
-change in postion/change in time
distance
a scalar quantity, how much ground an object had covered
NOT DIRECTION
speed
a scalar quantity, refers to how fast an object is moving
average/constant speed
distance/time
how to find the value of speed once it is constant?
slope = change in distance/change in time
instantaneous speed
speed at any given instant in time
velocity
vector quantity, rate at which an object changes its position
average velocity
displacement/time (change in position/time)
acceleration
vector quantity- rate at which an object changes its velocity
a= (v-v0)/t
*v0= initial velocity
*v= final velocity
*t=time
constant acceleration
changes velocity by same amount each second
NOT equal to constant velocity
units for acceleration
m/s^2
positive acceleration
add to the velocity
negative acceleration
subtract from velocity
relationships
postive acceleration & positive velocity: speeds UP
negative acceleration & positive velocity: slows DOWN
positive acceleration & negative velocity: slows DOWN
negative acceleration & negative velocity: speeds UP
do bodies that move with constant acceleration change velocity by equal amounts in equal distances or equal times?
equal TIMES
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