Day 3 1.2 Speed and Velocity - Blank Note.docx



Distance – Time GraphsWhen distance and time data is graphed,Time is on the x-axis (independent variable)Distance is on the y-axis (dependent variable)Example: A person walking at a constant speed18573751460500slope=m=riserun=?y?x=y2-y1x2-x1 381000101600Your graph must include:A titleLabeled axis with unitsLine of best fitTake up most of the graph paperDistance – Time Graphs vs Position (Displacement) – Time GraphsRecall: The slope of a distance - time graph is the ______________.We know that position and displacement are _____________ and include a direction. If position is represented on a position – time graph it will look very _______________ to a distance – time graph. One has a scalar quantity on the y-axis while the other has a vector quantity.Example: A crane flying at a constant speed in a straight line.95255080However, there are other important differences:Since position is a displacement from a point of origin, the slope of a position - time graph gives the ________________of the object with a direction.444500117396The graphs below represent the same trip to a video store. They show that not all distance – time graphs and corresponding position – time graphs are the _______________.The first two portions of both graphs are the same, but the last line segment slopes downward in the d-t graph rather than upward in the d-t graph. All line segments are the same ____________ and ____________ except for the negative versus positive in the last segment.More information is given in the position – time graph regarding the ________________ of the video store in relation to the reference point (home) and that the shopper has returned ______________ at the end.In general, position – time graphs can have a ______________ slope while this is never possible on a distance – time graph.ExampleUse the data from the graphs of the “Trip to the Video Store” to calculate the speed and velocity of the person during each of the three portions of the trip.Average speed associated with the distance travelled.Distance per unit timeHow it’s calculated38100046355Constant Speed (stays the same, every second the same distance is travelled) aka uniform.How it’s calculated430530232410Instantaneous VelocityMeasurement done at one moment in timeHow it’s calculated48006039370Examples:On average I walk 4 km/hA car on cruise control at 95km/hA jet 2.0 s after takeoff is travelling at 250km/h Practice:2146300720090014605006680200404812511938000159067512128500-317536195000Answers ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download