Physics > QUESTIONS & ANSWERS > Questions and Answers > PHYSICS SCI4445_Physics Web Search: Rotational Motion. (All)
Questions and Answers > PHYSICS SCI4445_Physics Web Search: Rotational Motion.
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Physics Web Search: Rotational Motion Period Open the Physics Animations Folder Open motion-2d ( http://phet.colorado.edu/simulations/sims.php?sim=Motion_in_2D ) 1. Click “Show Both” at the ... top, and “Circular” at the bottom 2. Which color vector represents velocity, and which represents acceleration? Circle: Velocity = Green or Blue specifically, tangential or angular? Acceleration = Green or Blue specifically, tangential, radial, or angular? Open rotation ( http://phet.colorado.edu/simulations/sims.php?sim=Ladybug_Revolution ) 1. Set the angular velocity to 90°/sec 2. Hit play, and notice the size of the green velocity vector and pink acceleration vector. 3. Reset, and move the lady bug to the very edge of the platform. 4. Set the angular velocity back to 90°/sec 5. What happens to the velocity vector? _____It becomes larger_____ What happens to the acceleration vector? ____It grows to a smaller degree than velocity 6. Use the ruler to determine the distance of the lady bug to the axis of rotation. (Assume each numbered division is a cm, not a meter). r = ___3.4 cm________ 7. Calculate the tangential speed v = ωr (be careful of angle units): .053 m/s 8. Calculate the radial acceleration: .084 m/s2 9. What is the tangential acceleration? 0 m/s2 [Show More]
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