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Flashback. Calculate the angular speed of the second hand on an analog clock the minute hand on an analog clock the hour hand on an analog clock ( ω = Δθ / Δ t). ω s = 0.105 rad /s ω m = 0.0175 rad /s ω h = 0.000145 rad /s. Symbols & Units Quiz on 2-3-2010. Circular Motion

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  1. Flashback • Calculate the angular speed of • the second hand on an analog clock • the minute hand on an analog clock • the hour hand on an analog clock • (ω = Δθ/Δt) ωs = 0.105 rad/s ωm = 0.0175 rad/s ωh = 0.000145 rad/s

  2. Symbols & UnitsQuiz on 2-3-2010 Circular Motion Physics Dave McCallister

  3. Symbol for time t

  4. Unit for time second (s)

  5. Symbol for distance d

  6. Unit for distance meter (m)

  7. Symbol for speed v

  8. Unit for speed meters per second (m/s)

  9. Symbol for acceleration a

  10. Unit for acceleration meters per second2 (m/s2)

  11. Symbol for force F

  12. Unit for force newtons (N)

  13. Symbol for mass m

  14. Unit for mass kilogram (kg)

  15. Symbol for work W

  16. Symbol for kinetic energy KE

  17. Symbol for potential energy PE

  18. Unit for work & energy joule (J)

  19. Symbol for power P

  20. Unit for power watt (W)

  21. Symbol for angular displacement Δθ

  22. Unit for angular displacement radians (rad)

  23. Symbol for arc length s

  24. Unit for arc length meters (m)

  25. Symbol for distance from axis (radius) r

  26. Unit for distance from axis (radius) meters

  27. Symbol for angular speed ω

  28. Unit for angular speed radians/second (rad/s)

  29. Symbol for angular acceleration α

  30. Unit for angular acceleration radians per second2 rad/s2

  31. Symbol for tangential acceleration aT

  32. Units for tangential acceleration meters per second2 (m/s2)

  33. Symbol for centripetal acceleration aC

  34. Units for centripetal acceleration meters per second2 (m/s2)

  35. Symbol for centripetal force FC

  36. Unit for centripetal force newtons (N)

  37. Symbol for gravitational force Fg

  38. Unit for gravitational force newtons (N)

  39. Front matter • The following slide shows what circular motion formulas will be given to you on Thursday’s circular motion quiz.

  40. Formulas: • θ(rad) = (π / 180°) x θ(degrees) • Δθ = Δs/r • ωavg= Δθ/ Δt • αavg = Δω/ Δt • Δθ = ωI + ½ α t2 • ωF = ωI + α t • ωF2 = ωI2+ 2α Δθ • Δθ = ½ (ωF + ωI) t • vT = rω • aT = rα • ac = vT2/r • ac = rω • Fc = mvt2/r • Fc = mrω2 • Fg = G m1m2 / r2 • Constants: • G = 6.673x10-11 N m2/kg2

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