Calculating trajectory of ball rolling down slope and off launch ramp
I think that u might get some projectile in free air equations from physics book like Halliday & Resnic or Nelkon & Parker. I dunno if efunda, an engineering website will contain physics equation.
I am giving credit to Art2000, for telling me about 555. Credit also due to rorschach, rorswarltz, gear loose, etc and names that I ought to remember but can't at the moment for helping out in my past projects. Many Thanks