Results 1 to 2 of 2

Math Help - Angular and linear velocity problem...

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    7

    Angular and linear velocity problem...

    To get linear velocity isnt the radius multiplied by the angular velocity in order to get linear velocity? Im lost I keep getting the wrong answers. For angular velocity I got 1,803,600 radians/hour and for linear velocity I got 23,741, 676 miles/hour. I dont get it.

    The problem is: The radius is 21.910 inches. A wheel rotates 150.5 times per second. I need to find:

    1. The angular velocity in radians/hour.
    2. The linear velocity in miles/hour.
    Last edited by princesasabella; January 31st 2010 at 08:46 AM. Reason: changing units for radius to inches
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Opalg's Avatar
    Joined
    Aug 2007
    From
    Leeds, UK
    Posts
    4,041
    Thanks
    7
    Quote Originally Posted by princesasabella View Post
    To get linear velocity isnt the radius multiplied by the angular velocity in order to get linear velocity? Im lost I keep getting the wrong answers. For angular velocity I got 1,803,600 radians/hour and for linear velocity I got 23,741, 676 miles/hour. I dont get it.

    The problem is: The radius is 21.910 degrees. A wheel rotates 150.5 times per second. I need to find:

    1. The angular velocity in radians/hour.
    2. The linear velocity in miles/hour.
    There are 3600 seconds in an hour, and 2\pi radians in a revolution, so the angular velocity will be 150.5\times2\pi\times3600 radians/hour.

    Whatever the radius is measured in, it certainly won't be degrees. You need to check what the units are for the radius, and then convert them into miles. Then multiply that by the angular velocity and you'll get the answer in miles/hour.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Linear and angular velocity 2 problems?
    Posted in the Math Topics Forum
    Replies: 6
    Last Post: January 6th 2011, 04:11 PM
  2. Angular velocity problem
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: January 31st 2010, 10:55 AM
  3. angular velocity problem
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: August 1st 2009, 05:40 AM
  4. Replies: 1
    Last Post: August 29th 2008, 02:18 AM
  5. need help with angular velocity problem
    Posted in the Advanced Applied Math Forum
    Replies: 0
    Last Post: March 31st 2008, 01:54 PM

Search Tags


/mathhelpforum @mathhelpforum