Multiple ChoiceThe 12,000-kg Lunar Command Module is in a circular orbit above the Moon's surface. If it spends ¼ of its fuel energy (−1.74×109-1.74\times10^9 J) bringing it to a circular orbit just above the surface, how high was its original orbit?127views2rank1comments
Multiple Choicea) How much work do you have to do on a 100-kg payload to move it from Earth's surface to a height of 1000 km?b) How much additional work must you do to put this payload into orbit at this altitude?157views
Textbook QuestionThe 75,000 kg space shuttle used to fly in a 250-km-high circular orbit. It needed to reach a 610-km-high circular orbit to service the Hubble Space Telescope. How much energy was required to boost it to the new orbit?74views
Textbook QuestionA 4000 kg lunar lander is in orbit 50 km above the surface of the moon. It needs to move out to a 300-km-high orbit in order to link up with the mother ship that will take the astronauts home. How much work must the thrusters do?38views