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Chapter 13: Newton’s Theory of Gravity

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Pages: 336 - 356

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83 Questions for Chapter 13: Newton’s Theory of Gravity

  1. Is the earth’s gravitational force on the sun larger than, smaller than, or equal to the sun’s gravitational force on the earth? Explain.

    Found on Page 353
  2. What is the ratio of the sun’s gravitational force on you to theearth’s gravitational force on you?

    Found on Page 353
  3. A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 0.0075m/s2 less than that at sea level. What is the observatory’s altitude?

    Found on Page 353
  4. Satellites in near-earth orbit experience a very slight drag due to the extremely thin upper atmosphere. These satellites slowly but surely spiral inward, where they finally burn up as they reach the thicker lower levels of the atmosphere. The radius decreases so slowly that you can consider the satellite to have a circular orbit at all times. As a satellite spirals inward, does it speed up, slow down, or maintain the same speed? Explain.

    Found on Page 353
  5. Saturn’s moon Titan has a mass of 1.35*1023kgand a radius of2580km. What is the free-fall acceleration o

    Found on Page 353
  6. A newly discovered planet has a radius twice as large as earth’s and a mass five times as large. What is the free-fall acceleration on its surface?

    Found on Page 353
  7. 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?

    Found on Page 353
  8. Planet Z is 10,000kmin diameter. The free-fall acceleration on Planet Z is role="math" localid="1648089747827" 8.0m/s2.

    Found on Page 353
  9. An astronaut on earth can throw a ball straight up to a height of 15m. How high can he throw the ball on Mars?

    Found on Page 353
  10. What is the escape speed from Jupiter?

    Found on Page 353

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