A spaceship ferrying workers to Moon Base I takes a straight-linepath from the earth to the moon, a distance of384000 {\rm km}. Suppose it accelerates atan acceleration19.6 m/s^2 for the first timeinterval 15.8 min of the trip, then travels atconstant speed until the last time interval15.8 min, when it accelerates at - 19.6 m/s^2, just coming to rest as it reachesthe moon.
A) What is the maximum speedattained?
B) What fraction of the total distance istraveled at constant speed?
C) What total time is required for thetrip?