Practice: You stand on the surface of a mysterious planet with a mass of 6×10<sup>24</sup>kg and measure the surface gravity to be 7 m/s<sup>2</sup>. What must the radius of the planet be?

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Practice: You stand on the surface of a mysterious planet with a mass of 6×10<sup>24</sup>kg and measure the surface gravity to be 7 m/s<sup>2</sup>. What must the radius of the planet be?

Practice: How far would you have to be above Earth’s surface for g to be ½ of its surface value?

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The mass of Venus is 81.5% that of the earth, and its radius is 94.9% that of the earth.(a) Compute the acceleration due to gravity on the surface of Venus from these data. (Express your answer in terms of the acceleration due to gravity on the Earth.)______ gE(b) If a rock weighs 29.4 N on earth, what would it weigh at the surface of Venus?_______ N

A satellite orbiting the moon very near the surface has a period of 110 min. What is the free-fall acceleration on the surface of the moon in SI units? [The mean radius of the moon is 1.74x106 m.]

A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 0.0055m/s2 less than that at sea level (gsealevel = 9.83 m/s2).What is the observatory's altitude? Assume Rearth = 6.37

A hypothetical planet has a radius 1.3 times that of Earth, but has the same mass. Part A What is the acceleration due to gravity near its surface? two signifcant figures, and units

Suppose we could shrink the earth without changing its mass. At what fraction of its current radius would the free-fall acceleration at the surface be three times its present value?

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