A 5000 kg spacecraft is in a circular orbit 2000 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4000 km above the surface?
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A 5000 kg spacecraft is in a circular orbit 2000 km above
the surface of Mars. How much work must the spacecraft engines perform
to move the spacecraft to a circular orbit that is 4000 km above
the surface?
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- At a particular point in orbit a satellite in an elliptical orbit has a gravitational PE of 6000 MJ with respect to Earth's surface and a KE of 5000 MJ. Later in its orbit, the satellite 's PE is 7000 MJ. What is its KE at that point? Explain.A 0.28-kg stone is held 1.2 m above the top edge of a water well and then dropped into it. The well has a depth of 5.2 m. (a) Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone−Earth system before the stone is released? J(b) Relative to the configuration with the stone at the top edge of the well, what is the gravitational potential energy of the stone−Earth system when it reaches the bottom of the well? J(c) What is the change in gravitational potential energy of the system from release to reaching the bottom of the well? Jlo and Europa are two of Jupiter's moons. lo orbits closer to Jupiter than Europa. Assume that both moons have the same mass. Which statement is true? lo has more kinetic energy, less potential energy, and more mechanical energy (potential plus kinetic) than Europa. lo has more kinetic energy, less potential energy, and less mechanical energy (potential plus kinetic) than Europa. lo and Europa have the same amount of mechanical energy (potential plus kinetic). lo has more kinetic energy, more potential energy, and more mechanical energy (potential plus kinetic) than Europa.
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