A 200g model rocket is observed to rise 100 m above the ground after launch. What must have been the launch speed of the rocket at the ground?  Do you use the equation  [math] \frac{{mv_1}^2 }{2}+mgh_1=  \frac{{mv_2}^2 }{2}+mgh_2[/math] ? Why are US unguided rocket launching pods so un-aerodynamic?