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One Dimensional Motion Simplest form of motion Motion takes place over time and depends upon a frame of reference Frame of Reference - a system for specifying the precise location of objects in space and time (See Visual CD for more information)
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Motion in One DimensionMotion in One DimensionCh 2Ch 2
Read and DefineRead and Define Take Home Lab #1Take Home Lab #1
Read Chapter 2Read Chapter 2
Complete the 6 vocabulary on page 67Complete the 6 vocabulary on page 67
One Dimensional MotionOne Dimensional Motion Simplest form of motionSimplest form of motion
Motion takes place over time and depends upon Motion takes place over time and depends upon a frame of referencea frame of reference
Frame of ReferenceFrame of Reference - a system for specifying - a system for specifying the precise location of objects in space and timethe precise location of objects in space and time
(See Visual CD for more information)(See Visual CD for more information)
DisplacementDisplacement
See Visual CD for informationSee Visual CD for information
Displacement- (Delta x or Displacement- (Delta x or x) the change in x) the change in position of an objectposition of an object
Delta- Delta- - change in a quantity - change in a quantity (final – initial)(final – initial)
x = xx = xff - x - xi i If along the x axisIf along the x axis
y = yy = yff - y - yi i If along the y axisIf along the y axis
DisplacementDisplacement Turn to page 41 and look at figure 2Turn to page 41 and look at figure 2
What is the Gecko’s displacement?What is the Gecko’s displacement? 85cm - 22 cm = + 63 cm85cm - 22 cm = + 63 cm
DisplacementDisplacement
From where you startFrom where you start
to where you end to where you end
it does not matter where you’ve it does not matter where you’ve been.been.
DisplacementDisplacement
Displacement is not always equal to the Displacement is not always equal to the distance traveleddistance traveled
Displacement can be positive or negativeDisplacement can be positive or negative
Answer the Conceptual Challenge #1 and Answer the Conceptual Challenge #1 and 2 on page 412 on page 41
Scalar VS VectorsScalar VS Vectors
ScalarScalar – – quantities with just magnitudequantities with just magnitudeEx: 55mphEx: 55mph
VectorVector- - quantities with magnitude and quantities with magnitude and directiondirection
Ex: 55mph , EastEx: 55mph , East
ScalarScalar VectorVector DistanceDistance displacement displacement
SpeedSpeed velocityvelocity
accelerationacceleration
Time may be considered its own categoryTime may be considered its own category The Physics 500 ActivityThe Physics 500 Activity
VariableVariable and and UnitsUnits DistanceDistance d d mm SpeedSpeed vv m/sm/s
TimeTime t t ss DisplacementDisplacement x x mm VelocityVelocity vv m/sm/s
variable- letter used in equationvariable- letter used in equation unit - measurementunit - measurement
Average SpeedAverage Speed average speed = average speed = distance traveleddistance traveled
time of traveltime of travelV = V = dd ttWhat is John’s average speed if he drove 10.0 What is John’s average speed if he drove 10.0
km, East and then drove 10.0 km, West in 15 km, East and then drove 10.0 km, West in 15 minutes.minutes.
20.0 km / 15 min = 1.3 km / min20.0 km / 15 min = 1.3 km / min
Average VelocityAverage Velocity
VVavgavg = = x x
tt
Graphing Student Motion Activity Graphing Student Motion Activity
Average VelocityAverage Velocity Average velocity = Average velocity = displacementdisplacement change in timechange in timeVVavgavg = = x x = = xxff - x - xii
t tt tff - t - tii
What is John’s average velocity if he drove 10.0 What is John’s average velocity if he drove 10.0 km, East and then drove 10.0 km, West in 15 km, East and then drove 10.0 km, West in 15 minutes.minutes.
0 km / 15 min = 0 km / min0 km / 15 min = 0 km / min
Average Speed and Average Average Speed and Average VelocityVelocity
Picture Practice problemsPicture Practice problems
Practice ProblemsPractice Problems
Pg 44 1-6Pg 44 1-6
Pg 47 #3Pg 47 #3
SlopeSlope Slope = Slope = rise rise
runrun
slope = slope = riserise = = x x = average velocity = average velocity run run t t
Instantaneous Velocity-Instantaneous Velocity- the velocity of an the velocity of an object at some instantobject at some instant
SlopeSlope
Pg 46 Figure 6Pg 46 Figure 6
Pg 47 #6Pg 47 #6