[I tried to fix some apparent typos. Sorry if I mangled something. A notebook showing the Manipulate you have so far would be helpful. - Forum Moderator]
I am trying to make a demonstration for Spring mass Damper system with rectangular pulse input with amplitude of 10 N. I have provided sliders for Stiffness and pulse; mass is kept constant. I want to vary pulse from 0 to a value which is calculated as 5*(2*Pi)/w, where w=Sqrt[stiffness/mass].
Can anyone please suggest a way to do it as stiffness can be varied. The end value of pulse should change accordingly in the slider.