how should 7)c) be done?
I initially subbed in the time to part a or b put, and worked out 'u' from that. This gave me like 14.1m/s but this didn't seem to make the vertical height right.
So I made the wonderful mistake of a last minute change of my working. The horizontal distance was just +3 to the distance from the previous part, but after the vertical height seemed wrong, I created two simultaneous equations which cancelled out 'u' (what I called the initial velocity), and gave me a time. I then subbed this time into the equation which gave me 6.4 or something, which seems unlikely, as it should surely increase if the ball is to travel 3m more horizontally?? Is either remotely the right method??