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Ten days after it was launched toward Mars in December
Chapter 13, Problem 18E(choose chapter or problem)
Ten days after it was launched toward Mars in December 1998, the ?Mars Climate Orbiter spacecraft (mass 629 kg) was 2.87 X 106 km from the earth and traveling at 1.20 X 104 km/h relative to the earth. At this time, what were (a) the spacecraft’s kinetic energy relative to the earth and (b) the potential energy of the earth–spacecraft system?
Questions & Answers
QUESTION:
Ten days after it was launched toward Mars in December 1998, the ?Mars Climate Orbiter spacecraft (mass 629 kg) was 2.87 X 106 km from the earth and traveling at 1.20 X 104 km/h relative to the earth. At this time, what were (a) the spacecraft’s kinetic energy relative to the earth and (b) the potential energy of the earth–spacecraft system?
ANSWER:Step 1 of 2 a)K.E = mv 1 2 2 3 2 = 1 × 629 kg × (3.33 × 10 m/s) 2 = 3.49 × 10 J9