Results 1 to 4 of 4

Math Help - functions

  1. #1
    Member
    Joined
    Dec 2007
    Posts
    137

    functions

    A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity v(t) (in m/s), at time, t (in seconds), is given by v(t)=25-9.8t. Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v2 [<- 2 as in squared, I don't know how to do sup text..] Express the ball's kinetic energy as a function of time, K(t)

    Big thanks to anyone who is willing to help with this! =)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by xxlvh View Post
    A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity v(t) (in m/s), at time, t (in seconds), is given by v(t)=25-9.8t. Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v2 [<- 2 as in squared, I don't know how to do sup text..] Express the ball's kinetic energy as a function of time, K(t)

    Big thanks to anyone who is willing to help with this! =)
    they simply want the composite function here. as in, they want you to find and simplify K(v(t)). can you do that?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Dec 2007
    Posts
    137
    What I got was...
    K(t) = 48.02t2 - 25.2t + 312.5 ?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by xxlvh View Post
    What I got was...
    K(t) = 48.02t2 - 25.2t + 312.5 ?
    that's incorrect. check your middle term again
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 15th 2010, 06:50 PM
  2. Replies: 3
    Last Post: February 23rd 2010, 05:54 PM
  3. Replies: 11
    Last Post: November 15th 2009, 12:22 PM
  4. Replies: 7
    Last Post: August 12th 2009, 05:41 PM
  5. Replies: 1
    Last Post: April 15th 2008, 10:00 AM

Search Tags


/mathhelpforum @mathhelpforum