OMPhQuiz_09_p76-83 - chapter 9 Gravitation Circular orbits...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
76 PhysiQuiz Contents Circular orbits (Section 9.3) 1, 2, and 3 are simple exercises to supplement the quantitative calculations of Examples 4, 5, and 6 in Section 9.3. 1. Satellite near Earth’s surface 2. Gravitational acceleration in outer space 3. Communication satellite above Planet X Elliptical orbits; Kepler’s laws (Section 9.4) 4. Angular momentum of 2 orbits • Context in the text: After the discussion of Kepler’s three laws in Section 9.4. Energy in orbital motion (Section 9.5) The following three problems are to supplement the examples given in Section 9.5: 5. Knock a planet out of the solar system—I 6. Knock a planet out of the solar system—II 7. Maximum height of a rocket chapter 9 Gravitation
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Determine the period of a satellite near the surface of the Earth ( r < R E ): T A2 p ! } R g E } § C2 p ! } R g E } § B ! } R g E } § D ! } R g E } § Hint: g 5 v 2 / R E 5 v 2 R E , where v 5 v/R E . This is the angular speed introduced in Question 10 for Chapter 6, with v 5 2 p / T . Extra: Use R E < 6400 km and g 5 10 m/s 2 to estimate the period T . Should it be 1.5 seconds, 1.5 minutes, or 1.5 hours? Explanation: Based on the hint, v 5 Ï gR E w . From this expression and v 5 2 p R E / T , we find that T 5 2 p ! } R g E } § . Answer 5 C. Explanation—extra: T 5 2 p Ï 6400 w 3 100 w 0/10 w < 6 3 800 s 5 80 min. It is slightly over an hour. R E 1. Satellite Near Earth’s Surface PhysiQuiz 77
Background image of page 2
Derive an expression for the gravitational acceleration at height h 5 R above the Earth’s surface. Express your answer in terms of g , the gravitational acceleration at the surface of the Earth. Notations: R and M represent the Earth’s radius and mass. Choose one of the following:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

OMPhQuiz_09_p76-83 - chapter 9 Gravitation Circular orbits...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online