Results 1 to 4 of 4

Math Help - [SOLVED] Velocities help

  1. #1
    Newbie
    Joined
    Oct 2009
    Posts
    13

    [SOLVED] Velocities help

    Woot i finally finished all my hw except i couldnt figure otu how to solve 6 problems. can you guys help me out plz!? thxs!


    Last edited by S2Krazy; October 4th 2009 at 11:19 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,444
    Thanks
    1863
    1) One full rotation is [tex]2\pi[tex] radians. If it rotates 2\pi radians in 23 hours, it rotates 2\pi/23 radians in one hour.

    2) The circumference of a circle 14 feet in diameter is 14\pi feet. If the wheel does 17 revolutions per minute, its circumference moves 17(14\pi) feet per minute.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Oct 2009
    Posts
    13
    i think im a little confused still on 1. so t=23 and theta = 2pi/23. so divide this and i get 2pi is this correct???



    also im a bit confused still on 2.

    I know the formula to use should be v=s/t. so if t= 17. and s = 14pi then divide those should be 14pi/17 but this doesnt seem right.







    can anyone help me out on!? 3-5
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Oct 2009
    Posts
    13
    alright so i figured out all of it but the last two! (so i deleted the other pic)

    so yeah im stuck on 4 and 5..


    for 4 i i know i did 44/6(44pi/3) but it says im wrong..


    and for 5 i thought i did it all correct but it doesnt look liek i did... for the chain i got 789600pi mm/hr, for the sprocket i got 16623.15789pi mm/hr, and for the Vtire i got 1163621.053pi mm/hr, and for the end result i got 3.655623351 km/hr but it says im wrong.




    nvm i got it all done finally...
    Last edited by S2Krazy; October 5th 2009 at 12:53 AM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. relative velocities
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 30th 2010, 07:43 AM
  2. Relative Velocities
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: August 22nd 2009, 07:48 AM
  3. Velocities of curves.
    Posted in the Calculus Forum
    Replies: 1
    Last Post: March 18th 2009, 07:42 AM
  4. Distances and velocities
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 17th 2009, 02:23 PM
  5. relative velocities
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: September 16th 2008, 10:00 PM

Search Tags


/mathhelpforum @mathhelpforum