PHY101_Chap7Fall09

PHY101_Chap7Fall09 - 7.1 Rotational Motion and Law of...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 7.1 Rotational Motion and Law of Gravity Smooth, circular objects Will he catch the turtle? He can reach out 1m. Kinematics in circles displacement x is the same for everyone. x x x A. Linear motion: B. Rotational motion Reference line angle is the same for everyone, while linear distances and speeds are not. Quiz Qn. 1 When you go around a circle, the total angle covered is: 1. 0 degrees 2. 180 degrees 3. 360 degrees 4. 90 degrees Will he catch the turtle? He can reach out 1m. r Reference line s Angle-angular position Circumference/r = 2 Conversion: rad to degree A). Definition 1 revolution: 1 rad = 360/2 Counter-clockwise " +" . Clockwise (decreasing ) "-" The Sun The Moon =s/r= =s/r= 0.5 0.5 Total solar eclipse =93,000,000 mi =240,000 mi =2,160 mi =864,000 mi Example Average angular velocity = angular displacement/elapsed time avg = / t = ( - )/(t-t ) Angular Velocity = - Angular Displacement Angular Acceleration Example A floating volleyball serve To make a volleyball serve float, the server has to spin the ball for a fraction of a second, a good example of aerial dynamics. The ball goes from 1 = 0 rad/s to 2 = 1.0 rad/s during t = 0.1 s. Find . Angular Linear v 2 = v 2 +2 ax (with comparison to 1-D linear kinematics) 7.2 The Equation of Rotational Motion Example = 36.0 rad/s, = 34.2 rad/s, t = 0.595 s =-3.03 rad/s 2 How many revolutions does the ball make before being caught?...
View Full Document

This note was uploaded on 01/02/2010 for the course PHY 101 taught by Professor Pralle during the Fall '08 term at SUNY Buffalo.

Page1 / 31

PHY101_Chap7Fall09 - 7.1 Rotational Motion and Law of...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online