Distance -Time Graphs Position -Time Graphs Linear

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Presentation transcript:

Distance -Time Graphs Position -Time Graphs Linear d/t graphs

Quantities Scalar- A quantity with magnitude only Examples: Vector- A quantity with magnitude and direction(can be a negative number) Examples:

Terms Distance-Separations between two points Position-Object’s placement with respect to a reference point Displacement-change in position of an object. Formula(df – di ) Speed-distance an object travels over time Velocity- is speed and a direction(change in position over time)

Information that can be determined from d/t graphs 1. Distance = Just read it off the graph

Info continued 2.Slope of a d/t = average speed or velocity. Pay attention to what object is doing….Formula is

3. Instantaneous Speed =Cannot be determined using a position time graph unless object is moving at constant speed.

Non Linear d/t Graphs Distance-Read it off the graph

Non Linear d/t graphs Slope must be determined by a tangent to the curve

3. Instantaneous Speed =Can only be done with a tangent to the curve.

Fundamental Units in Physics Mass- Kilograms Time- Seconds Length – Meters Acceleration- m/s2 Units for speed or velocity Km/hr-kilometers per hour m/s- meters per second

Calculating Speed (Velocity)

Velocity Word Problems A car travels 6.02m in 3.50sec. What is the car’s velocity? A dog chases a rabbit at 3.42m/s for 8.63m. How much time did this take the dog?

Ms. Polasek travels from her room at 3. 02m/s for 12. 3s Ms. Polasek travels from her room at 3.02m/s for 12.3s. How far did she travel?