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!

Step function Laplace transform - can someone check my work?

  1. Dec 1, 2016 #1
    1. The problem statement, all variables and given/known data
    upload_2016-12-1_0-49-14.png

    2. Relevant equations


    3. The attempt at a solution
    1
    ##3u(t)-3u(t-2)##
    ##\frac{3}{s}-\frac{e^{-2s}3}{s}##

    2
    ##\frac{5t}{2}u(t)-\frac{5t}{2}u(t-2)##
    ##\frac{5}{2s^2}-\frac{5e^{-2s}}{2s^2}##

    3
    I have no idea how to do this one.
     
  2. jcsd
  3. Dec 1, 2016 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    How about using the (integral) definition of the Laplace transform?
    You can use Euler's rule to change the cosine factor to more exponentials, leaving just exponentials in the integrand, then perhaps reverse that to get the real transform.
    Don't forget to change the phase angle to radians.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Step function Laplace transform - can someone check my work?
Loading...