Results 1 to 3 of 3

Math Help - dependence speed to time, physics

  1. #1
    Newbie
    Joined
    Jun 2013
    From
    asdasd
    Posts
    22

    dependence speed to time, physics

    dependence speed to time, physics like in puctyre : http://www.x3m.biz/11a.png
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    14,973
    Thanks
    1121

    Re: dependence speed to time, physics

    I have no idea what "dependence of speed to time" means. It is not a complete sentence- there is no verb.

    And I cannot read the language in your link. Since it says "a= v/t" and, further has a "7", "10 k/h", and "10/7". I might guess they are saying that the (average) acceleration in increasing speed by 10 k/h in 7 hours is 10/7 k per hour^2. You could also say that if you accelerate at 10/7 km per hour per hour for 7 hours, you speed will have increases by 10 km per hour (v= at).
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member ebaines's Avatar
    Joined
    Jun 2008
    From
    Illinois
    Posts
    906
    Thanks
    244

    Re: dependence speed to time, physics

    According to Google translate the OP's picture says:

    7s with a speed of 10 Km/hr
    the ratio of speed to time
    is 10/7.

    I think the OP is misusing the formula for acceleration which is not v/t but rather change in velocity over time. If speed is constant at 10 Km/hr, then acceleration is 0. But if speed changes by 10 Km/hr in a period of 10 seconds then the acceleration is:

     a = \frac {\Delta v} t = \frac {10 \frac {Km}{Hr}}{7 s} = \frac {10 Km}{7 Hr-s} \times \frac {1000m}{1 Km} \times \frac {1 Hr}{3600 s} = 0.4 \frac m {s^2}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. dependence speed to time, physics
    Posted in the Math Forum
    Replies: 1
    Last Post: July 3rd 2013, 10:44 AM
  2. Replies: 4
    Last Post: September 2nd 2012, 03:50 PM
  3. The Speed of Time
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: June 30th 2010, 03:19 PM
  4. physics-how to calculate speed
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: October 29th 2007, 08:16 PM
  5. Horizontal Speed - Physics
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: May 15th 2007, 06:23 PM

Search Tags


/mathhelpforum @mathhelpforum