Ganymede, one of Jupiter's moons, is the largest moon in our solar system. It has a mass of 1.48 × 1023 kg and a radius of 2.63 × 10 m. A 15.0 kg lunar rover is on Ganymede's surface. 55. As the rover orbits Ganymede, it is observed that during a particular segment of time, its speed decreases. During this segment of time, the work done by gravity on the rover is: a positive b) negative c zero d) more info is needed to determine 56. Find Ganymede's escape speed (the minimum launch speed from Ganymede's surface such that the projectile never falls back). a) 2.39 km/s b) 2.74 km/s c) 3.09 km/s d) 3.44 km/s e) 3.79 km/s

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Chapter1: Units, Trigonometry. And Vectors
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55-56. Ganymede, one of Jupiter's moons, is the largest moon in our solar system. It has a mass of 1.48 × 1023 kg and a radius of 2.63 × 10 m. A 15.0 kg lunar rover is on Ganymede's surface. 55. As the rover orbits Ganymede, it is observed that during a particular segment of time, its speed decreases. During this segment of time, the work done by gravity on the rover is: a positive b) negative c zero d) more info is needed to determine 56. Find Ganymede's escape speed (the minimum launch speed from Ganymede's surface such that the projectile never falls back). a) 2.39 km/s b) 2.74 km/s c) 3.09 km/s d) 3.44 km/s e) 3.79 km/s
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