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It is 2058 and you are taking your grandchildren to Mars. At an elevation of 48.9 km above the surface of Mars, your spacecraft is dropping vertically at a speed of 323 m/s. The spacecraft is to make a soft landing that is, at the instant it reaches the surface of Mars, its velocity is zero. Assume the spacecraft undergoes constant acceleration from the elevation of 48.9 km until it reaches the surface of Mars.
What is the magnitude of the acceleration?

Sagot :

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