1. The problem statement, all variables and given/known data a)find the velocity when x = 3, b)find the time taken to travel between x=1 to x=3. when x = 1, v = 0 2. Relevant equations a=2x 3. The attempt at a solution a)using the chain rule I got v = 2x^2 + u (u as a constant), but I think that's wrong. i tried using dx/dt = dv/dt * dx/dv b)I integrated that with respect to time giving 3/16, but I think the solution there is wrong too. I'm not really sure how to tackle this type of problem, and I'm pretty sure I'm missing something here, my book hasn't shown me any examples so far relating to this so I hope someone can help me, I'm a bit rubbish at calculus anyway and there's no answer in the back to guide me.