I have used the equation
s=ut + 1/2atsquared
This is Motion
Posted Fri 18th October, 2013 @ 12:27 by
Artsy444
You plug the values into s=ut+1/2at^2. You will be left with 20=5.5t+2t^2.
therefore: 2t^2+5.5t-20=0
Using the quadratic formula you can find your values for t. (Ignore negative value)
Answered Tue 10th December, 2013 @ 08:02 by
Ragnaros the Firelord