A long conducting wire AH is moved over a conducting triangular wire CDE with a constant velocity v in a uniform magnetic field B G directed into the plane of paper. Both wires AH and CDE are kept in contact with each other. Choose the correct statement below
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A spacecraft is in a circular orbit around the planet Mars at a height of 140 km.
A small part of the spacecraft falls off and eventually lands on the surface of the Mars.
The small part has a mass of 1.8 kg.
During its fall, the small part loses 0.932 MJ of gravitational potential energy.
Calculate the gravitational field strength of Mars.
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