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: Laplace Transform for a circuit

  1. Apr 14, 2010 #1
    1. The problem statement, all variables and given/known data
    It's been a while since I've done laplace transforms, but I need some help with one!
    I am supposed to find the laplace tranform for the following signal. This is for my circuits class btw.

    xa(t) = 2u(t-1)


    2. Relevant equations

    Laplace tables. http://tutorial.math.lamar.edu/Classes/DE/Laplace_Table.aspx

    3. The attempt at a solution
    I am guessing that the u(t-a) part is a unit step function correct? From there, I am not exactly sure how to go. I don't see any transforms that fit exactly.
     
  2. jcsd
  3. Apr 14, 2010 #2

    Mark44

    Staff: Mentor

    #25 is u(t - c). Yes, this is a unit step function.

    And L{kf(t)} = kL{f(t)} because of the linearity of the Laplace transform.
     
  4. Apr 14, 2010 #3
    Thanks for the reply mark!
    So using 25, I would have 2*e-s/s ?

     
  5. Apr 15, 2010 #4

    Mark44

    Staff: Mentor

    Yes.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook