1. The problem statement, all variables and given/known data An unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 52.0 km. To the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 27.0 m/s. If nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface? 2. Relevant equations mass of moon = 7.36*10^22 kg radius of moon = 1.7374*10^6 m 3. The attempt at a solution This is what I tried, but I got the wrong answer. Can someone please tell me what I did wrong. Thanks in advance.