Alimentary my dear Hannibal.
50 km/h = 50000m / 3600s = 13.9m/s
1.5 m/s/s for 12 s = 18m/s
add 18m/s to 13.9 m/s comes to 31.9 m/s
which is
31.9 x 3600/1000 = 114.8 km/h
Brain the size of a planet me.
[This message has been edited by Bally Heck (edited 14 June 2001).]