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  1. Starter By what factor does the centripetal acceleration change if the angular velocity is doubled? Tripled?

  2. STARTER This graph of tangential velocity vs. angular velocity for a point on a spinning disc, indicates that the point is what distance from the center of the disk?

  3. Practice Recall from the circular motion study that: v =wr and ac = w2r You will investigate these relationships.

  4. Application : Circular Motion Lab Open “ Ladybug Revolution in phet physics simulations, online. Go to Rotation tab. Choose the following options: ( Close the q graph.) Put the ladybug 2m from the center of the wheel. Set w at 1,2,3,………………10 rad/sec and record v for each. Plot v vs. w and get a fit.

  5. Application : Circular Motion Lab Open “ Ladybug Revolution in phet physics simulations, online. Go to Rotation tab. Choose the following options: ( Close the q graph.) Put the ladybug 2m from the center of the wheel. Set w at 1,2,3,………………10 rad/sec and record a for each. Plot a vs. w and get a fit.

  6. Questions for the Lab • What is the slope of your v vs. w graph? What is the meaning of this number? • Is the a vs. w graph linear? What is the coefficient of the squared term? What is the meaning of this number? • How would your v vs. w graph have changed if you had placed the object • closer to the center of the rotating disk?

  7. Lab Report Checklist Put this in your science notebook. 2 Data Tables V vs. w graph with a curve fit a vs. w graph with a curve fit. Questions Summary

  8. Exit What do you expect the a vs. w graph to look like? Explain.