A spaceship ferrying workers to Moon Base I takes a straight-line path from the earth to the moon, a distance of 384,000 km. Suppose it accelerates at an acceleration 19.8 [tex]m/s^2[/tex] for the first time interval 15.9 min of the trip, then travels at constant speed until the last time interval 15.9 min, when it accelerates at -19.8 [tex]m/s^2[/tex], just coming to rest as it reaches the moon. there are three questions to this problem, but i will ask the first one first. 1.)What is the maximum speed attained? using the formula d1 = x(0) +v(0)*t + 1/2at^2 x(0) = 0 because the velocity is zero d1 = 1/2(19.8) * (15.9 *60)^2 <--- converted to secs. well that's the speed for distance #1, but since it's constant just before it reaches distance #3, shouldnt that be the maximum speed?