Physics

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33 Terms

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Left & down
negative
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Right & up
positive
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Scalar
Scalars are quantities that take into account amount, not direction
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vector
Vectors are quantities that take into account direction
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Unit used to describe time
seconds
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displacement formula
final position - initial position (xf-xi)
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speed
scalar
does not take into account direction
distance/t
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velocity
vector
displacement/t
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slope
speed
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Negatives in physics
opposite way (go by absolute value)
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Distance
does not take into account direction—\> scalar
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unit for distance and displacement
meters
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Displacement
Displacement takes into account the "net" distance traveled, therefore it is a vector quantity.
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curved lines are
not lines
not constant slope
changing slope
changing velocity
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Constant slope
constant velocity
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0 slope below x axis
negative velocity
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getting steeper over time (negative way
negative steep velocity
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Acceleration
describes an object's change in velocity over a given period of time
meters per second per second
m/s/s
m/s^2
vector
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Kinematics
way of describing the motion of objects without describing the causes.
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You can describe an object's motion
In words
Mathematically
Pictorially
Graphically
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Symbol: t
Variable: Time
Unit: s
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Symbol: a
Variable: acceleration
Unit: m/s^2
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Symbol: x or y
Variable: Displacement
Unit: m
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Symbol: v
variable: final velocity
Unit: m/s
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Symbol: Vo
Variable: Initial Velocity
Unit: m/s
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Symbol: g
Variable: acceleration due to gravity
Unit: m/s^2
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GUESS method
Givens [initial velocity counts as well], Unknown[what we're looking for], Equation, Substitute, Solve.
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If velocity and acceleration have the same sign,
the object is speeding up
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Kinematic equations
All are used when the acceleration is CONSTANT.
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Starting from rest
initial velocity is zero
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Coming to a stop
final velocity is zero
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V\=Vo+at
no displacement
final velocity
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x\=vot+1/2a(t^2)
displacement
no final velocity
can be used to find distance