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One of the instruments on the probe has a spring (with a weight of 1.0 kg at one end) that measures the intensity of the gravitational force of the asteroid. If the spring is displaced (from an equilibrium point inside the instrument) 0.25 m, what is the spring's constant? If the probe were on the surface of the Earth, Mars and Venus, how much would the spring be displaced on each of these planets? What would be its maximum "bobbing" velocity if it were on Earth?

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