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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. 3.43.6.
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
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11/18/2008 6:19 PM
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View Full Document (b)Calculate the magnitude of the gravitational force exerted by the human on
Venus
.
529.4
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This note was uploaded on 02/21/2010 for the course PHYS 2211 taught by Professor Prog during the Spring '09 term at Georgia Institute of Technology.
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