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Lesson 8 – Relative Motion

Lesson 8 – Relative Motion. August 2, 2013. Learning Goals. The student will understand that just like position depends on the frame of reference, so does the velocity. Frames of reference moving with constant velocity (includes v = 0 and v = constant ). Frames of Reference, Level Up.

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Lesson 8 – Relative Motion

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  1. Lesson 8 – Relative Motion August 2, 2013

  2. Learning Goals • The student will understand that just like position depends on the frame of reference, so does the velocity. • Frames of reference moving with constant velocity (includes v = 0 and v = constant)

  3. Frames of Reference, Level Up • Relative Motion Video

  4. Relative motion of a Ball, Ship and Water • All motion is relative • General Case:

  5. Fernando’s Favourite • A train has a speed of 20 km/h. Raindrops falling against its side windows make traces inclined at 30 to the vertical. We ignore air turbulence and there is no wind. • A) What is the horizontal component of a raindrop’s velocity with respect to the Earth? With respect to the train? • Ans. 0, -20 km/h • B) What is the velocity of the raindrop with respect to the Earth? With respect to the train? • Ans. – 35 km/h j, 40 km/h [S30  W]

  6. Legacy of Excellence • A person walks up a stalled-escalator in a department store in 90 s. When standing still on the same escalator in motion, he is carried up in 60 s. How much time would it take him to walk up the moving escalator? Could he walk down the escalator while it was moving up? If so, how long would that take? (Sir Isaac Newton Contest) • Ans. 36 s, no

  7. Required Before Next Class • Check the website and facebook page, as I will be organizing what you will be working on during the week off from school • Go to the course website: www.quantumtunneling.weebly.com • Add me on Facebook, Peter Bishop, but be sure to send a message along with it indicating which class you are in, and what section.

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