Lecture Question Sheet 2

Lecture Question Sheet 2 - 9. If the Sun was twice as...

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1. State Newton’s law of gravity. 2. If the Earth was twice as massive as it actually is, would the length of the year change? 3. What is acceleration? If I am accelerated from rest at 9.8 meters per second per second, how fast am I going after 2 seconds? 4. What is the law of inertia? 5. Describe in words why a gravitational force causes objects to orbit. 6. What is Kepler’s Frst law? 7. What is Kepler’s second law, and what does it imply about the relative speed of an orbiter at closest (perihelion) and furthest (apohelion) distance?
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– 2 – 8. Name the planets, in order, from the closest to the furthest from the Sun
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Unformatted text preview: 9. If the Sun was twice as massive as it actually is, but the Earth remained at the same distance, what would the change in the length of the year be? 10. If the Earth was three times as far away from the Sun as it is, how long would the year be? 11. Why was Galileos discovery of the satellites of Jupiter signiFcant to the heliocentric model? 12. Why is Pluto not considered a planet anymore? Representative review questions, Chapter 2: 9, 14, 17, 18, 20 Representative self-test questions, Chapter 2: 10, 16, 17, 18, 19 Representative problems, Chapter 2: 1, 8, 12, 14, 15 (part one)...
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This test prep was uploaded on 04/06/2008 for the course SCIENCE V55.0202 taught by Professor Blanton during the Fall '07 term at NYU.

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Lecture Question Sheet 2 - 9. If the Sun was twice as...

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