1. The problem statement, all variables and given/known data The spring in the figure (link 1) (a)is compressed by length [tex]\Delta[/tex]x. It launches the block across a frictionless surface with speed v0. The two springs in the figure (link 2) (b) are identical to the spring of the figure . They are compressed by the same length [tex]\Delta[/tex]x and used to launch the same block. What is the block's speed now? picture1: http://session.masteringphysics.com/problemAsset/1000762/5/knight_Figure_10_38a.jpg picture 2: http://session.masteringphysics.com/problemAsset/1000762/5/knight_Figure_10_38b.jpg 2. Relevant equations Fsp = -k[tex]\Delta[/tex]s Us = 1/2 k([tex]\Delta[/tex]s)2 K = 1/2 mv2 3. The attempt at a solution I'm not sure what the effect of two springs would be, but in terms of V0 I feel like it might be 2V0, but that seems to easy.