1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Please help me with this problem?

  1. Oct 8, 2009 #1
    Please help me with this problem??

    1. The problem statement, all variables and given/known data

    The question is:

    the tires on a new car have a diameter of 2.0 ft and are warranted for 60000 miles (3.2*e^9 ft).

    (a) Determine the angle (in radians) through which one of the tires will rotate?

    (b) How many revolutions are equivalent to ur answer in part a?>

    2. Relevant equations
    theta = s/r

    3. The attempt at a solution

    theta = (3.2*e^9 ft / 1.0 ft) * (2pi radian/ 360 degree) = 5.0* 10^6 radian, but the answer says 3.2*e^8 radians. How's that possible.

    How do I find omega (revolution per second?)
  2. jcsd
  3. Oct 8, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Re: Please help me with this problem??

    When the wheel has moved forward by one circumference, it has rotated by 2π radians.
    How many circumferences can fit in 60,000 miles?

    Why do you want to find omega?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook