Hey guys so I have a quick question about the algebra for a question like this. I personally like to do the algebra first before I plug in the numbers so I have question for this one where it seems would be safer to plug in the numbers first? So won't be to tough, A book falls from a shelf that is 1.75m above the floor. How long will it take the book to reach the floor? So we have initial velocity = 0 Displacement = 1.75m Acceleration/ gravity = 9.81m/s Time=? Its obvious that we can use the formula d=Vi(t)-1/2at^2 So my question here is for the algebra if we plug the numbers in first it would be easier since we have initial velocity =0 so we can do (0)t=0. But if we didn't this is where I have trouble since I'm not the best at algebra, we'd get Square root( (2d/g)) - Vi(t) = t which confuses me because of the initial velocity * Time? What would we have to do with the time there. Thanks, I hope I didn't confuse anyone lol.