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Motion

Motion. Physics. Science that involves matter and its motion through space and time. We just finished Chemistry: Study of the properties and behavior of matter. Distance and Displacement. Distance and Displacement. How fast is this lady running? Earth spins at 1670 km/ hr

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Motion

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  1. Motion

  2. Physics • Science that involves matter and its motion through space and time. • We just finished Chemistry: Study of the properties and behavior of matter.

  3. Distance and Displacement

  4. Distance and Displacement • How fast is this lady running? • Earth spins at 1670 km/hr • And it is moving around the sun at 107,000 km/hr

  5. Distance and Displacement • To describe motion accurately, a frame of reference is necessary. • Frame of reference is a system of objects who are not moving with respect to one another. • Ex: Earth is the “stationary” frame of reference when cops measure the speed of our cars.

  6. Measuring Distance • Distance: the length of a path between two points • Classroom examples?

  7. Measuring Distance • The SI unit for measuring distance is the Meter (m). • WE WILL NOT BE USING MILES, FEET, or INCHES in Science class!! • Why do we use metric?

  8. Measuring Distance • Large distances are measured in Kilometers (km). • One kilometer is equivalent to how many meters? • One centimeter is one hundredth of a meter!

  9. Measuring Displacement • What is distance? • Displacement: The DIRECTION from the starting point and the LENGTH of a straight line from the starting point to the ending point.

  10. Measuring Displacement • Walk 10 blocks • Walk 10 blocks north from Kroger

  11. Combining Displacements • Vector: Quantity that has magnitude and direction. • Magnitude can be size, length, or amount. • Arrows are used to represent vectors. • Size of the arrow corresponds to magnitude (size)

  12. Combining Displacements • Vector addition is the combining of vector magnitudes and directions. • Add displacements using vector addition.

  13. Combining Displacements • Displacements along a straight line.

  14. Combining Displacements

  15. Combining Displacements

  16. Combining Displacements

  17. Combining Displacements

  18. Combining Displacements

  19. Displacement that isn’t Along a Straight Path • Resultant Vectors: Vector sum of 2 or more vectors.

  20. Speed and Velocity • Speed • Average speed • Instantaneous speed • Graphing Motion • Velocity • Combining Velocities

  21. Speed • Speed: The ratio of the distance an object moves compared to the amount of time the object moves. • SI unit for speed is meters/second (m/s). • If a car travels 40 km in 5 hours, how fast is the car moving?

  22. Speed • Average Speed: Computed for the ENTIRE DURATION of the trip. • Instantaneous Speed: Measured at a particular instance.

  23. Average Speed • Average speed (v) = total distance traveled (d) divided by the total time (t).

  24. Average Speed

  25. Average Speed

  26. Average Speed

  27. Average Speed

  28. Instantaneous Speed • Instantaneous Speed: The rate at which an object is moving at a given moment in time. • A car’s speedometer measures instantaneous speed.

  29. Graphing Motion

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