Warning: This is mixed with physics, though all the physics work is done. Only formatting the equation is needed. 1. The problem statement, all variables and given/known data L is needed from this equation: L-l= 1/2 a(T-τ)2 Given: t τ l 2. Relevant equations T=√(2L/a) a=2l/t2 3. The attempt at a solution L= 1/[STRIKE]2[/STRIKE] [STRIKE]2[/STRIKE]l/t2 (([STRIKE]2[/STRIKE]Lt2)/[STRIKE]2[/STRIKE]l-2*√((2Lt2)/2l)*τ+τ2 ) + l (the 2's at 1/2 2l/t^2 and 2lt^2/2l are removed right?) Completely lost here. I think it would be better to attach a picture no?