# Finding Lift Force - Glider Wing

by aaronmorg
Tags: force, glider, lift, wing
 P: 6 I found the equation for Horizontal Velocity. Here it is for anyone else who might be stuck in the same place. VH=$$\sqrt{\frac{2E}{m}}$$ E is energy m is mass In my case Energy was elasticity since my glider was flung from a rubber band. So I had to find ft-lbf, then use different conversion factors to get to a suitable velocity unit. My work: VH=$$\sqrt{\left[\frac{2(4.1625)ft-lbf}{27.999g}\right]\left[\frac{453.6g}{1 lbm}\right]\left[32.2\frac{lbm-ft}{lbf-s}\right]}$$ Leaving me with Velocity in Ft/s VH= 65.899 ft/s Additional Information: I was given a chart, from whence I figured that 15 in displacement gave 3.33 lbf, and converted to ft-lbf, giving me my E.