December 14th, 2010, 03:38 AM  #1 
Senior Member Joined: Oct 2009 Posts: 895 Thanks: 1  what is the angular speed ?
[color=#0000BF]what is the angular speed ?[/color]Angular speed is the speed of the angular velocity [color=#0000BF]what is the unit of the angular speed ?[/color]rad/s [color=#0000BF]show that relation btween the angular and liner speed is given by v=?r ?[/color] Positive relationship [color=#000080]4  The diameters of the main rotor and tail totor of a single engine helicopter are 7.6 m and 1.02 m, respectively . the respective rotational speeds are 450 rev/min and 4138 rev/min .Calculate the speed of the tips of both rotors?[/color] 
December 14th, 2010, 06:18 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: what is the angular speed ?
Angular speed is the rate at which an object spins or rotates, usually given in revolutions per second. A common unit in physics for angular speed is radians per second. An arc length s is related to the radius and angular displacement by: Differentiate with respect to time t: 4. The speed of the tip of the main rotor is: The speed of the tip of the tail rotor is: 
December 14th, 2010, 10:52 AM  #3 
Senior Member Joined: Oct 2009 Posts: 895 Thanks: 1  Re: what is the angular speed ?
thanks so much

December 14th, 2010, 11:00 AM  #4 
Senior Member Joined: Oct 2009 Posts: 895 Thanks: 1  Re: what is the angular speed ?
How you got 3.8 and 0.51 
December 14th, 2010, 11:48 AM  #5 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: what is the angular speed ?
By taking the diameter and dividing by 2 to get the radius.


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