# Ch3 HW2 - Ch3 HW2...

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Ch3 HW2 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 21 out of 21 Due: Wednesday, September 10, 2008 09:00 AM EDT Description Gravitational force and prediction of motion. Instructions Reading: Sec. 3.4-3.6. In question 5 we lead you through the several steps necessary to calculate the gravitational force as a vector. In question 6 we ask you to do a similar calculation on your own; carry out the same steps as in question 5. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 03.X.08.01] 2/2 points The mass of the Sun is 2 10 30 kg, and the mass of Venus is 4.9 10 24 kg. The distance from the Sun to Venus is 1.1 10 11 m. (a) Calculate the magnitude of the gravitational force exerted by the Sun on Venus . 5.426e22 5.43e+22 N (b) Calculate the magnitude of the gravitational force exerted by Venus on the Sun. 5.426e22 5.43e+22 N Solution or Explanation | grav | = G M 1 M 2 /r 2 , therefore the magnitude of the gravitational force is the same for both masses. 2. [MI2 03.RQ.28] 5/5 points (a) Calculate the magnitude of the gravitational force exerted by Venus on a 60 kg human standing on the surface of Venus . (The mass of Venus is 4.9 10 24 kg and its radius is 6.1 10 6 m.) 529.4 529 N Ch3 HW2 http://www.webassign.net/[email protected]/student.pl?n=2008... 1 of 4 11/18/2008 6:19 PM

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(b)Calculate the magnitude of the gravitational force exerted by the human on Venus .
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