So for 16 on the WebAssign due tonight, I feel like I'm completely missing something. I algebra-ized two of the kinematics equations [ x=.5(vf+vo)t and vf=vo+at ] and got x=.5(2vo+at)t, hoping that then I could set the two rocks equal to each other because their x values are the same, and then solve for time somehow. This failed. Miserably. I looked a little bit at trying to set x=vot+.5at^2 equal to itself, again because the two x values should be the same, but didn't get anywhere. It feels like you have to make an equation equal to t, and then figure out a way to set that equal to itself (with one side adding the extra time until the second rock is thrown).

Hope this makes some semblance of sense... any suggestions?

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## walsh416

So for 16 on the WebAssign due tonight, I feel like I'm completely missing something. I algebra-ized two of the kinematics equations [ x=.5(vf+vo)t and vf=vo+at ] and got x=.5(2vo+at)t, hoping that then I could set the two rocks equal to each other because their x values are the same, and then solve for time somehow. This failed. Miserably. I looked a little bit at trying to set x=vot+.5at^2 equal to itself, again because the two x values should be the same, but didn't get anywhere. It feels like you have to make an equation equal to t, and then figure out a way to set that equal to itself (with one side adding the extra time until the second rock is thrown).

Hope this makes some semblance of sense... any suggestions?

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