Results 1 to 4 of 4

Math Help - Physics

  1. #1
    Super Member
    Joined
    Oct 2006
    Posts
    679
    Awards
    1

    Physics

    I wanted someone to look over my work to see if my answers are correct.

    Thank You!


    A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.5m/s. Two seconds later the bicylicts hops on his bike and accelerates at 2.4m/s^2 until he catches his friend.
    (a) How much time does it take until he catches his friend?
    (b) How far has he traveled in this time?
    (c) What is his speed when he catches up?

    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,129
    Thanks
    1010
    for (a) , I get t = 6.28 sec from the time his friend passes him

    (b) \Delta x = \frac{1}{2}(2.4)(t-2)^2 \approx 22 \, m

    (c) v_f = (2.4)(t-2) \approx 10.3 \, m/s
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Oct 2006
    Posts
    679
    Awards
    1

    RE:

    Uhh yes you are right. I just happened to accidentally forget to plug my time into the (t-2) equation. I just inserted it.

    Thank You so Much!!
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member
    Joined
    Oct 2006
    Posts
    679
    Awards
    1

    RE:

    Also I have another question is reference to this problem. Anytime the question says "catches up" is that always subtraction? In our case (t-2). How could this question be worded to where they would give me an addition such as (t+2)?

    Thanks,
    qbkr21
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Got a physics question or interested in physics?
    Posted in the Math Topics Forum
    Replies: 16
    Last Post: February 3rd 2014, 02:56 AM
  2. physics help...
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: February 17th 2009, 07:20 AM
  3. how do solve quantum physics or physics equations
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: March 26th 2008, 05:33 AM
  4. Physics...
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: March 5th 2008, 08:31 PM
  5. physics, acceleration, physics problem
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: September 29th 2007, 04:50 AM

Search Tags


/mathhelpforum @mathhelpforum