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Physics 2 – Jan 17, 2019

Explore the application of conservation of energy principles to solve a physics problem involving a downhill skier. Collaborate on solving the problem and review concepts related to work, energy, and power. Engage in a PhET simulation activity to reinforce learning.

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Physics 2 – Jan 17, 2019

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  1. Physics 2 – Jan 17, 2019 • P3 Challenge– • What conditions must be met to apply conservation of energy for a system? • Then work together to finish the last problem we had on Tuesday • Today’s Objective: Conservation of Energy Get out Cons of E p1-2 for HMK Check Show me Work – KE WS if not yet

  2. When there is friction…. • Ex: A 62.9-kg downhill skier is moving with a speed of 12.9 m/s as he starts his descent from a level plateau at 123-m height to the ground below. The slope has an angle of 14.1 degrees and a coefficient of friction of 0.121. The skier coasts the entire descent without using his poles; upon reaching the bottom he continues to coast to a stop; the coefficient of friction along the level surface is 0.623. How far will he coast along the level area at the bottom of the slope? (Use energy methods)

  3. Agenda, Assignment • IB 2.3 Work, Energy and Power • Conservation of Energy • Assignment: • Conservation of Energy PhEt Activity • Agenda • Conservation of Energy PhEt Activity • Time to work on pending assignments / homework review

  4. Conservation of Energy PhET • Pull up the Energy Skate Park PhEt on a laptop, phone or classroom computer. • Go to phet.colorado.edu • Select • Play with Simulations • Physics • Work, Energy & Power • Energy Skate Park - Run the Java App • Take time to play and find out what the simulation can do and how the buttons work. Share what you find with others. • Then follow through the Lab Activity

  5. Exit Slip - Assignment • Exit Slip- What conditions must be met to apply conservation of energy for a system? • What’s Due? (Pending assignments to complete.) • Conservation of Energy Worksheet p1-2 • What’s Next? (How to prepare for the next day) • Read 2.3 p78-95 about Work and Energy

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